Tested on Lubuntu 21.10 x86_64 (GNU/Linux)
WORKAROUNDS
FileNotFoundError exception @ main.py, line 68. Case sensitive!: missing Assets/hard.png but Assets/Hard.png exists.
There is no music or sound in the game.
The graphics are too simple, I mean, there are no animations or visual effects.
There is no physics.
The character moves very fast and continuous when you fire the gun.
There is no application of the game jam theme.
Difficulty selection is appreciated.
Score: 1/10