Good game. The concept is amazing!
I got some points that could maybe improve the game:
Difficulty buildup is HIGH. I got stuck to solve some levels for a lot, which eventually gave me frustration and forced me to give up on the game at a certain point. Having to manage both direction and speed of the rocket is pretty hard usually, since you don't have references of where you shoot the last shot. Maybe a little arrow indicating the "last shot" would be great to be able to adjust slightly and reach the goal.
Overall, I liked the game! Congrats!