I agree with the previous comments on the controls and the tutorial's difficulty; after a reasonable effort I didn't actually finish the tutorial :\ (I got stuck on the part where one has to use shooting to go upwards - I saw now in a comment that the trick is shooting faster).
Additionally I feel it would be much nicer if the mechanics were introduced gradually throughout the game, giving time to the player to learn and apply them, instead of an "overdose" at the the beginning.