Because he's still planning his "payback" - *cough*
For the rest of us with sanity, this level is not good. I suggest you read the Wiki article on level design, which was already linked, but I'll do it again: http://www.srb2wiki.sepwich.com/wiki/Level_Design
Small stages lack any sort of gameplay variety, and lack space to run around. You should have at least enough space in the stage to get away from your opponent. Look at the official stages - Meadow Match is about the smallest you should realistically attempt.
For the rest of us with sanity, this level is not good. I suggest you read the Wiki article on level design, which was already linked, but I'll do it again: http://www.srb2wiki.sepwich.com/wiki/Level_Design
Small stages lack any sort of gameplay variety, and lack space to run around. You should have at least enough space in the stage to get away from your opponent. Look at the official stages - Meadow Match is about the smallest you should realistically attempt.