The 37 block platformer. Contains all "basic" components such as moving, jumping, falling, dying, and level changing. Made with one sprite, one costume, and the level backdrops. However, it doesn't have any: slope management, hitboxes, moving parts (besides the player), jump pads, enemies, wall jumps, unique mechanics, etc. Not even a thumbnail. Pathetic, right?
Inspired by @GarboMuffin's platformers with extreme block restrictions. New, slightly better version here: https://scratch.mit.edu/projects/1291406299/