Very fun puzzles and concept. The only thing is that, personally, using 'Z' to jump feels a bit weird. Maybe consider switching the jump to the up arrow instead?. Overall, good game, good job! :)
The main reason I used the Z key for jumping is because it’s what I’m personally used to (and it also puts it next to the X and C keys which are used for other actions). I probably could have included some alternate controls though! Thanks for the feedback.