The biggest fuck up/Timewasting shit you've done in...

[Mable]

come back

Why did you come back then lol.

[Sewpah]

Thinking that the first levels that I've ever made in SMBX (made between late 2009 and early 2010) were the best. That or abandoning my previous projects.

[RoundPiplup]

Making a section that took quite a long while then deleting it because it didn't feel interesting.