Nice platformer and you definitely feel lack of controls when it alters each level. However I would think adding some more mechanics would be good, as it becomes somewhat boring after few levels.
I've also hit a bug (I think) where both left and right movement got same hotkey and I wasn't able to move left/right at all.
Double jump is OP, you can basically skip half or even two third of platforms.
Graphics are basic, but look pretty slick. Music and sounds are good!