Really well crafted game! 5/5
The bouncing bullets added a lot of fun without being to hard to dodge and the choices felt nice over all.
The only feedback I can think of is to make the effect of the choices more obvious (e.g. increasing damage migh change the color and or size of the bullet in some way), even though I understand that it might be hard to automate unless you set a maximum powerups of a given type.
Great job!