Jet fighter update (Patreon)

This weekend I've finished the jet fighter minigame with animation and sound.
Animating all of those enemies, I've discovered the inefficiency of the simple animation system I've wrote.
I have few ideas for a better system planned in my head, however, it needs some experimentation with time keeping a drawing the images on the screen.
I have gone down that rabbit hole and almost spend half a day reading documentations, but didn't really get to test much of what I wanted to do and it has to wait till later.
For now, let's call this minigame done and move to something new. I have few fun minigames in my head that might fit the visual novel format better than a retro game.

The code is in the attachments, give it a try and let me know if there's something you want me to improve on.