I like these kinds of games, even though there were some problems with it (i guess due to time). I do what i do best and list some nitpicks:
Player comfort could be better. The game is hard and you fail a lot - this means i want to head straight back into the action and not have to use the mouse of all things to navigate to the retry option. Either make it auto-retry or use the same key as the launch one. And on that note i would also use the same key for launch and boost as there really is no need to differentiate.
The boosted rocket gets suddenly really slow after a few seconds. That is really weird and messes with the aiming. Maybe make it so it gradually gets slower instead?
And at last a few more level would have been nice (but i get it if the time was to short).
Hope some of that is helps.