Incredible art and fun gameplay! This could evolve into a fun full-fledged game.
Some people have already adressed some bugs that happened to me as well, so I won't mention them here. However the gameplay can be kinda unforgiving at times. I like hard games that can be a bit frustrating, but with this kind of gameplay the health system can be... obnoxious. I'd say that removing lives and just teleporting the player near whenever you die (like what it already does when you fall) with the time limit is already enough challenge (as some people have already said, the "Final Hours" screen is kinda intrusive. Just add the final hours text at the bottom with some highlights). I'm guessing the live system was implemented because of the enemies but I think a flinch is better than just restarting the whole level.
Overall, even with the negatives, I really liked it and would love to play more in the future if this goes somewhere! The color palette and the sprites are beautifully done, the SFX and music fits perfectly and the ideas presented are great! Good job~