This is a very minimal very rushed game submitted for the Lisp Game Jam (Spring 2018).

Use the arrow keys to move (or WASD).
Slow your movement by holding the Z or Y keys.
Don't let bullets touch the black dot in the middle of your player.
Do let bullets touch the ring around the dot to collect points and damage enemies.
Feel free to download the source and edit levels.lisp, I believe you can make better levels than I have. :)

Can you survive all 3 levels?