don't know if your still developing this but i'll give some feedback anyway.
a quite liked having a fun little platformer with this thruster based movement system I especially liked the car level but there are some problems:
like the invisible ceiling which is really annoying as is it often only just above were we have to go, i would recommend making it visible and moving it up a little. the level with the moving buildings it quite confusing as at first i cant tell how i line up with the buildings and being behind them makes controlling the banana from a front view on the other side of the buildings quite difficult i think you should put the banana above the road and the buildings come right up to the road if you spawned on the ground on the road as normal (with a gap in the buildings so you dont die) would make it easier to understand were you are and control the banana easier it is an espacially frustrating level when failure makes you go all the way back to the start. i think you should add some kind of life system were you start with 3 lives when you die you lose a life and restart the level so you get a few tries at any new level you reach without having to play everything again.
I hope this helps.