This is a tutorial cartridge for making a defender clone in pico8.
Player's controls and camera movements.
Enemy's shooting AI on the seamlessly wrapped area.
Pixel perfect sprite-based collision.
Checking if the object is within the screen or not.
good idea but:
- add comments and proper ident!!!
- your pixel perfect collision can certainly be made a lot faster using bitmasks
(fixed version of this old post: https://www.lexaloffle.com/bbs/?pid=70416#p)
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