This was super fun, if also super frustrating! Had a great time with it.
The music fits the game really well, and the minimal sounds. And being able to draw the little platforms at an angle is a really nice touch.
One note, there is a bug if you are playing inside the page (i.e. don't fullscreen) and then accidentally hit the 'go fullscreen' button the controls somehow go weird - for me, it was both a and d would run to the right. If you escape out to windowed it works correctly again.