Short and sweet.
At first you think this is a silly game where you just shove rabbits in a closet, but it turns out that it is about this misable person, just being constantly bothered by a problem that was small before but has grown by so much. And the person at the door just might kick him out.
I notice that the crossbar goes behind the clouds, that can be quite annoying when enemies (mostly flying ones) come to play. And why is there a jump cooldown bar? You should add a shooting cooldown bar instead, why limit the number of jumps?
Yea, I though lvl 2 was hard too, but if you use some kind of snake pattern you can get it. When you are dropping, lift your nose up when it is at a high enough volocity (It is better when it says to pull up) and use your engine (not all of it) and do this a considerable amount of times and you should reach the goal.
If you don't get it, just up-down-up-down-up, etc. And use your fuel when going up.