notes.txt

2d collision detection:
- https://noonat.github.io/intersect/
- https://dyn4j.org/2010/01/sat/
- https://box2d.org/files/ErinCatto_DynamicBVH_GDC2019.pdf

geometry dash physics:
- https://gdforum.freeforums.net/thread/48749/p1kachu-presents-physics-geometry-dash

sprite resources:
- https://www.spriters-resource.com/mobile/geometrydash/
- https://opengameart.org
- https://geometry-dash.fandom.com

makefile automatic variables:
- https://stackoverflow.com/a/37701195

sd cards:
- https://electronics.stackexchange.com/a/602106

fat:
- https://www.win.tue.nl/~aeb/linux/fs/fat/fat-1.html
- https://en.wikipedia.org/wiki/Master_boot_record
- https://en.wikipedia.org/wiki/Partition_type

audio:
- https://deku.gbadev.org/program/sound3.html
- https://www.cs.nmsu.edu/~rth/cs/computermusic/Simple%20sound%20generation.html
- https://modarchive.org