I pretty liked the game !
I loved the little Vfx, animations and camera shake and so on it quickly make the game having good feeling, you did your part on the juicness and it miss for a lot of the games on this jam so congratulations !!
The density mechanic is very interesting and i think it can even have more opportunities to offer a variety of games ! But at the begining it wasn't very clear for me how i can use it and interact with the wall even with the text tutoorial (which are really welcome thats good you did it)
One part of Level design can be improved i think, you learn most by die and retry, but the level are short so this is not frustrating to restart and you mlove pretty quickly and easily so thats fine if this is intended in your game experience i guess ! But on the level design there is a good challenge curves and good variety on how to solve the "puzzle" to finish the levels. I really liked the fact it is dynamic with the enemy AI and the leaf flying and wind blowing so you have to react and think in the same time and i really got fun here it was a pleasure !
Unfortunatly there was no sound effects or music so the game felt really empty on the audio and it was a pity beceaus your SFX and animations would have benifit so much of that ! Donn't hesitate to take free of use SFX or music, even if it is not perfect or not have time to do it all, put in on the most important and recurrent part of your game it will improve your game greatly
I Liked the cartoony style, even if it can be improved (i think on my opinion) it works and is still pleasant to look at so that's fine :)
Anyway, i know how hard is to finish a game so congratulations to have made it i think you can be proud of you !