After trying several different concepts in the first few hours, I finally settled on this: an endless platformer where you buy powerups with HP before starting, then try to get as far as you can. The result is somewhere between Geometry Dash and Super Mario Bros., though not nearly as high-quality as either. Unfortunately I couldn't get everything done in time, and as a result, there's only a few hazards and powerups, and only one repeated level. Still, it was a fun experience to create this mess in under 72 hours!