Love the concept. The idea of steering the spaceship in-directly is a nice touch.
I did had trouble knowing if I should pickup the fuel canisters (and the ones with the +) or not. Picking them up triggered a particle explosion and wasn't sure if it was good or bad.
(in the end, after using my jetpack for a bit I noticed picking up fuel actually did something ... but it could be a bit more clear)
And yeah, the music started to get a bit repetitive after a while.