For anyone who may have been waiting for it, here is the walkthrough of all content included in the current version (v1.1). I've also added it to my original post, and will be updating it for each subsequent version of the game.
Walkthrough
Spoiler: show
General
Gaining cheese: Go to your kitchen and check what's in the fridge. Take some cheese.
Cheese is also available at the Fox Market (once unlocked) in exchange for mice or 'discounts' (sexual favours)
Gaining other items (eg grapes/string): All other equipable items can be purchased at the Fox Market (once unlocked) in exchange for mice or 'discounts' (sexual favours)
Gaining a mouse companion: (Requires cheese) From your garden, go to the abandoned house next door and knock on the fence. Offer some cheese and then ask if the mouse wants to hang out with you. Promise they won't get eaten by a predator. The mouse will now follow you wherever you go. (To remove your mouse companion without them being eaten, return to the abandoned house next door. They will leave automatically)
Unlocking Fozz: From your garden, go to the abandoned house next door and call up to the raven. After a brief exchange, you will be able to return to your garden. From this point on, Fozz will be available directly from your garden.
Raising/Lowering Fozz's opinion: After unlocking Fozz (above), a number of interactions with them will improve or decrease their opinion of you, which affects what options are available with them. To increase Fozz's opinion of you, compliment them, bring them mice, give them gifts or engage in any physical interactions that you have unlocked (through kinks, dialogue options etc). To decrease Fozz's opinion of you, insult them or - in the extended Talk menu - ask them about their gender before you have used the above methods to improve their opinion of you. If their opinion is already low, you can also further decrease it by offering yourself as a gift and then changing your mind.
Unlocking the Fox Market: The Fox Market must be unlocked through dialogue options with other characters. Either: take your mouse companion indoors and ask them how the mice next door feed themselves (note: mice will not share their secrets in front of humans, so try the lounge, hallway or bedroom). OR. Tell Fozz that you like their clothes. After you have been told about the Fox Market, head to the bottom of your garden to find the new location option.
Sneaking into the Fox Market: After unlocking the Fox Market (above) and completing your first visit, you will be able to sneak into the Fox Market on later visits. The next time you go from your back garden to the Fox Market, an orange option to "Sneak in without knocking" will be available. Select this option.
Changing your nickname: In the standard intro game, Angel will try to give you a nickname once you are finished playing Chase with her. This stage will be skipped in Quick Start. However, in both versions you can alter your nickname to anything of your choice. To do so, head from your garden to Angel's garden and talk to her. Choose the option "Can we talk about my nickname?" (standard intro) or "I'm ready for you to give me a nickname" (Quick Start). Then type out your desired name.
Vore
Tan as Willing Prey
Angel: (Standard intro) When leaving your bedroom for the first time, go into the bathroom instead of the garden. Continue watching Angel until she calls you over, then go to her window. When she closes the window and threatens to eat you, offer to be "a good snack" (green option).
- After playing Chase with Angel and leaving her garden, return to her garden and talk to her. Ask her for a favour, then ask her to eat you.
The Foxes (Vol/Rey): (Requires Fox Market unlocked) After unlocking the Fox Market (see above), enter that location. Ask to see their wares (or agree to be shown them if on your first visit), then ask what currency their prices are in (or ask for a reminder about their currency). When they explain that squirrels are valid currency, exchange yourself for their products. When they explain that you will be eaten, agree to that and choose who will inherit your account once you are gone. At that point you will be able to choose your predator between the two foxes.
- When sneaking into the Fox Market (see above), there are two ways to be caught by the foxes. The quickest way is to attempt to steal from Vol or Rey's suitcases without waiting. The longer/less definite way is to wait until they are distracted (these scenes are randomised but their 'distracted' state should be contextually clear) and then choose to steal from one of the suitcases. Each time you take an item/rescue a rodent, there is a random chance the next 'Keep Going' option will lead to you getting caught. You will be caught by the owner of the suitcase (Vol as pred for Vol's suitcase, Rey as pred for Rey's suitcase). After being caught by the respective fox, take the green option to turn the sequence into a willing scene.
Fozz: After unlocking Fozz (see above), offer Fozz a gift, then offer yourself.
- If Fozz's opinion of you gets too low, Fozz will grab you and threaten to eat you. Choose the green option for a willing outcome.
Tan as Unwilling Prey
Angel: (Standard intro) When leaving your bedroom for the first time, go into the bathroom instead of the garden. Continue watching Angel until she calls you over, then go to her window. When she closes the window and threatens to eat you, choose either of the orange options for slightly varied unwilling scenes.
- After playing Chase with Angel and leaving her garden, return to her garden and talk to her. Ask her for a favour, then ask her to eat you. This sets up a willing scene, but once you're in her bedroom you can tell her you've changed your mind (orange option) for an unwilling variant.
The Foxes (Vol/Rey): (Requires Fox Market unlocked) When sneaking into the Fox Market (see above), there are two ways to be caught by the foxes. The quickest way is to attempt to steal from Vol or Rey's suitcases without waiting. The longer/less definite way is to wait until they are distracted (these scenes are randomised but their 'distracted' state should be contextually clear) and then choose to steal from one of the suitcases. Each time you take an item/rescue a rodent, there is a random chance the next 'Keep Going' option will lead to you getting caught. You will be caught by the owner of the suitcase (Vol as pred for Vol's suitcase, Rey as pred for Rey's suitcase). After being caught by the respective fox, take the orange option for an unwilling sequence. Vol's sequence includes gross elements and betrayal/humiliation, as well as an optional epilogue if you choose to masturbate in his stomach.
Fozz: If Fozz's opinion of you gets too low, Fozz will grab you and threaten to eat you. Choose the orange option for an unwilling outcome.
Tan as Pred w/ Willing Prey
Ant: From the garden, head to the bottom of the garden and then approach the ant hill. The option to pick up an ant will be randomised to either willing (green) or unwilling (orange). Either pick up an ant and then put it down or leave the ants and then return until the option is green. Then pick up that ant. All options with that ant will trigger willing scenes.
Mouse: (Requires Mouse Companion) From your garden, take the mouse companion to the kitchen, then the hallway. Talk to the mouse in the hallway, bedroom or lounge and ask if you can eat them. If asked, they will consent. Then move to the bedroom and "Interact with the mouse". The option to eat them now triggers a willing scene.
Tan as Pred w/ Unwilling Prey
Ant: From the garden, head to the bottom of the garden and then approach the ant hill. The option to pick up an ant will be randomised to either willing (green) or unwilling (orange). Either pick up an ant and then put it down or leave the ants and then return until the option is orange. Then pick up that ant. All options with that ant will trigger unwilling scenes.
Mouse: (Requires Mouse Companion) From your garden, take the mouse companion to the kitchen, then the hallway, then the bedroom. Select the option "Interact with the mouse" then choose to eat them. NOTE - If you talked to the mouse and asked if you could eat them at any point, this option will instead be willing (green). If you have done this but would like an unwilling scene, either eat the mouse or return them to the mouse house in order to get a new mouse.
Tan as Observer - Unwilling Prey
Angel: With a mouse companion, move from your garden to Angel's garden. Angel will eat the mouse.
Fozz: With a mouse companion, move from your garden to Fozz's fence (once unlocked). Fozz will eat the mouse.
Vol: After sneaking into the Fox Market (see above), choose the "Wait" option. The results are randomised, but some include Vol eating mice.
Unbirth
Rey: After unlocking the Fox Market (see above), enter and ask to see their wares (or agree to be shown them on your first visit). Ask about their prices but don't offer yourself. Ask for a discount and let Rey use you as a dildo.
Anal Vore
Tan as Prey
The Foxes (Vol/Rey): After unlocking the Fox Market (see above), enter and ask to see their wares (or agree to be shown them on your first visit). Ask about their prices but don't offer yourself. Ask for a discount and let either of the foxes use you as a buttplug.
Tan as Observer
Fozz: (Requires Mouse Companion) After unlocking Fozz (see above), bring your mouse companion to them. Ask Fozz to shove the mouse up their butt. NOTE - If you have the Sadism kink unlocked, you can propose a way to keep the mouse up their butt indefinitely. If you choose this option, the mouse will remain for the rest of the game (and beyond...), otherwise it will disappear when you move to a new day (although different days are not yet available).
The Foxes (Vol/Rey): When following the 'buttplug discount' path (above), both foxes make reference to previous rodents they have anal vored, with some having not ever come back out.
- After sneaking into the Fox Market (see above), choose the "Wait" option. The results are randomised, but one includes Vol shoving a mouse up an unwilling squirrel's butt.
Sex
Consensual
Fozz: After unlocking Fozz (see above), raise their opinion of you (see above). Bring them to the ground by either offering a gift (requires cheese or grapes) or bringing them a mouse (requires Mouse Companion). You can then 'proposition' Fozz and ask to fuck them. If their opinion of you is high enough, they will agree.
- Alternatively, talk to Fozz and ask if they are a boy or a girl (note: if their opinion of you is not already high, this will decrease their opinion of you.) This will lead to information about their cloaca. Ask to see it and then to touch it. If their opinion of you is high enough, they will agree. After the scene of you touching Fozz's cloaca, you will have the option to either lick it or fuck them. This will still require their opinion of you to be high enough.
Mouse: (Requires Mouse Companion) From your garden, take the mouse companion to the kitchen, then the hallway. Talk to the mouse in the hallway, bedroom or lounge and ask if you can eat them. If asked, they will consent. Then move to the bedroom and "Interact with the mouse". The option to eat them now triggers a willing scene.
Non-con/Dub-con (Tan as dom)
Mouse: (Requires Mouse Companion) From your garden, take the mouse companion to the kitchen, then the hallway. Talk to the mouse in the hallway, bedroom or lounge and ask if you can eat them. If asked, they will consent. Then move to the bedroom and "Interact with the mouse". The option to eat them now triggers a willing scene.
Oral Sex
Fozz: After unlocking Fozz (see above), raise their opinion of you (see above). Talk to Fozz and ask if they are a boy or a girl (note: if their opinion of you is not already high, this will decrease their opinion of you.) This will lead to information about their cloaca. Ask to see it and then to touch it. If their opinion of you is high enough, they will agree. After the scene of you touching Fozz's cloaca, you will have the option to either lick it or fuck them. Ask to lick it for an oral sex scene. (Note: After first talking to Fozz about their cloaca, the option to touch - and then lick - their cloaca can also be accessed in the 'proposition' option whenever Fozz is on the ground).
Paws
Angel: While playing Chase with Angel, react to being pressed beneath her feet. She will then ask you to lick her feet, which you can do in a willing or unwilling manner. If you choose either of these option, you will activate the Paw kink.
- (Requires Paw kink to be active) Ask Angel for a favour. If the Paw kink is active, several paw-related options will appear. Please note that these scenes are not yet available, but will be added in the next update (v1.2)
- (Requires Paw kink to be active, requires Mouse Companion) With a mouse companion, move from your garden to Angel's garden. Before Angel eats the mouse, ask her to trample them first.
Fozz: After unlocking Fozz (see above), raise their opinion of you (see above). Bring them to the ground by either offering a gift (requires cheese or grapes) or bringing them a mouse (requires Mouse Companion). You can then 'proposition' Fozz and ask to rub their feet. This does not require the Paw kink to be active, but it will play a sightly altered scene if the kink is active. It will also activate the kink if it isn't already active.
Tan: (Requires Paw kink to be active, requires Mouse Companion) From your garden, take the mouse companion to the kitchen, then the hallway, then the lounge. Exercise on your bike, then have the mouse clean your sweaty paws. This can be with them using their shirt, their fur or their tongue.
If there's any content you feel should be included that I've missed off in my walkthrough, please let me know and I'll get it added. Thanks, and enjoy!