A nifty little game with a pretty big problem. I really like the physics of this game and I found it quite challenging yet enjoyable up until level 4. It's either impossible or near impossible to progress because of the small gap one must pass through near the very top left of the level. It doesn't help that the perspective is not completely centered for that ultra-tiny gap either. After several slow and careful attempts, even going as far as using the sparks from the thruster to line up my descent, I just no longer have the drive to continue playing. Maybe readjust the player's perspective a bit where needed or add some light sources to illuminate the challenging gaps?
A fun idea that could be something great if refined.