Great game! Kinda reminds me of bomberman with different sort of gameplay XD. The graphics were nice, sounds were appropriate and helped enhance the mood of the game.
One thing though, I felt that on most situations where I am using the jet pack, I also constantly look at the top left part of the screen to ensure that I have sufficient fuel. One suggestion that might work is to place another meter right next to the character (just a tiny vertical fuel meter), that turns on whenever the character jet packs, but hides when the character is not using the jet pack.
The top left meter will still be there to check for fuel during times when the jet pack is not on, but at the very least, implementing this will cut the amount of time players need to look to the top left of the screen while the jet pack action is going on. This, I believe, may help to enhance the experience the game provides.
Other than that, great game and I really liked the concept :D