This is a great puzzle game that I would definitely play a lot of on my phone during downtime with some more polish! I made it to level 4!
Maybe start level 1 with only 1 planet and then gradually add more planets in the following levels for a more gradual build up of difficulty? Also it would be great if the angle would already update when not holding the mouse button and if you could see the force and angle of your previous shot. This way if you had a near miss you can slightly adjust those parameters for your next shot.