For the positives I really love a lot of the sprites like deerling, eevee and Audino but also others that I saw in the sprite folder like Liepard and illumise to name a few (I also found a bug where after feeding my pokemons too much some of them went back to their original sprite for some reason), the ability to make choices is pretty neat and adding something like a karma system would be a very cool addition in my opinion.
As for the negatives, the leveling is kind of all over the place the first trainer is too overleveled and it takes a long time to level up your squad (at least in my opinion), there is zero warning when one of your mons is getting hungry so I had to save a lot of times to avoid any of my pokemons being eaten, from my experience when you explore the cave you get absolutely swarmed by mawiles every couple of steps which is pretty annoying so there should be the option to buy repels in the shop, the moveset that your eevee has at the beginning is not that great in my opinion since metro-nom is your only offensive move and due to it's reliance on luck it makes the early game a slog, you also can't check your moves during battle for some reason, you can't enter some of the houses and there is a lack of npc's to talk to/interact with.
I won't complain about the gym fight since it's a placeholder but Nova (as in the pokemon) was a pain to kill due to it's ability and them spamming Tail strike.
Overall the game as of now is very grindy but there is a lot of potential, you just need to balance and polish it a little more so don't get discouraged.