Beta Forever + Mappack (and Time Trial!)
A few months ago I made a mappack that gathered all mar0 test levels posted on the Stabyourself.net channel. I ended up not developing it for 3 months due to other projects, but I finally finished it. It has all test levels. The SMB Time Trial level isn't in the mappack because it's not a test level and it has its own mappack, which I'll post here as well.