24 Hour Hack
A short mini-hack with 4 levels, a secret area, and a bowser level, all made in under 24 hours, in a single session.
Console Notes:
I didn't optimize it for console, but I was curious and played through it and it is possible to obtain everything. There may be a few crashes in places, or lag, though, although I did make course 3 a lot better in 1.2 so it shouldn't be a major problem anymore.