You could consider this a hand drawn version Ad Nauseum.
The game consists of three levels: day, afternoon, and night. Each level features different enemies and a different style (shapes, cartoons and numbers and letters).
To power up your gun, collect falling + signs and avoid - ones.
Features three difficulties.
Made in two days for the GameJolt Game Jam.
Completely hand drawn.
*Disable blurring effect in game if you are using Windows 7 and have had problems.