I already said this on discord but I will put it here too, because why not.
This game has a great idea. A big problem is definitely that Z being jump is really confusing. And I would really appreciate it if this was longer, it is fun. I also think that putting a timer would be nice, as this seems like a really good speedgame. Also, a level select menu would be really nice, especially if you can go back to that menu after you win. But overall, great game!