The idea is good and it has been implemented decently.
Since its a platformer you should have a rather simple or linear difficulty curve where as this game's difficulty curve is quite random at times. Make the earlier levels the baseline for the difficulty of the latter ones.
The pixel art and animations have been done really nicely.
I really love the cats and their comments each run. if the player is stuck or smt you can have the cats give the player some hints.
The game is in good need of a restart or previous loop button as rn to restart you have to leave the level and it's not really explained. The levels are well designed just need to have a simpler difficulty especially for this jam.
And as you yourself would already know, MUSIC. The game needs music and SFX. Also implement different level mechanics/objects if possible to make progression more interesting.
All in all it's a creative design and could be better with some Soundtracks/SFX and Level design improvements(In terms of difficulty and level mechanics)
Also Apologies if I may sound harsh. This IS a good game, I just wanted to give some improvement suggestions I though would work.