Game had massive lag at some points for seemingly no reason. The music loop was very jarring, I would suggest adding some kind of fade to the start of your music for like, a quarter to half a second to stop it being jarring every time you loop.
I like the idea, however I feel like I've seen it done better elsewhere unfortunately, it's just a bit too finnicky to control and death planes are rather difficult to judge at times. However it still works as a puzzle platformer.