The idea is really really good, and you managed to make it look nice and show exactly what's going to happen. It was way too difficulty for me though, I finished the tutorial by chance and couldn't make one delivery in the main game. I feel like I would have enjoyed it more as a series of puzzles with increasing difficulty (like the tutorial), with asteroid scaling as your ship is moving coming way later into play. But maybe it is just not for me, I'm not really a rocket scientist x)

It is the most creative and intelligent use of the theme I've seen so far though!