Noice! Glad to see another vore platformer on the portal. The concept and initial outlook is very nice, I'd hazard we'll get more characters as the game progresses, and overall, I'm very interested in seeing how the game develops.
Now, for the less than good notes...
The gears in level 1, during the beige cavern bit, are in the foreground of platforming sections. It's a design choice, yes, but for some it messes with their perception and makes platforming a bit harder than it should be. Maybe move them to the background? Set up some nice gear sprites?
Another thing, which many have already mentioned, is that unbirthing seems really hit-or-miss. I get that you're trying to make it more difficult, and I'm wholly okay with that - but it seems like fake difficulty when enemies can just automatically no-sell an attack without the player noticing it. Have some sort of dodge animation or pushback animation to show players when they missed, at least - although if it was me doing the enemy coding, I'd let the players try to UB thin air like in GVB, so they can practise the attack at their leisure, and just make the hitbox well inside Lapis so she has to get up in the enemies' face and risk getting beat back in order to use the move with a good chance of success.
As it is, though, it looks too much like a glitch, and I wouldn't be surprised if it fooled more people into thinking it was a glitch.
Anyway, nice work! Looking forward to the next updates!