Cool game!
I have some issues tho
1. Options get reseted each death or level, which is stressful
2. i think you should make the movement less slippery and more accurate, but that´s just me.
All in all, i like the style of the game aswell as the fact that you have to aim upwards to hit the enemys, interesting and fun. Graphics style is also cool and the music is alright. I´d like to see the 1. getting fixed but i still like your game, good job! :)