It’s a neat game (with an artstyle thats’s pretty good) with a good limitation idea, but (seconding yumehiko) the current implementation of it feels a little bit underutilized, like a re-texturing of some rooms could just make it a run-of-the-mill platformer after being aware of the rule in the jump room (I don’t know how but that room got me pretty good the seconds before, during, and after I read the text).
Overall, it’s a pretty neat game with a great concept!