I went with seven levels since making Tofu Boy levels isn't super fun and kind of limiting. They're all up now, though I can't create a chapter so I guess you will have to pretend. Maybe some day!
For fun and I guess partially morbid curiosity I decided to make a Tofu Boy chapter. It's currently in progress with six of the planned eight levels done. I wasn't going to post until it was done but I'm curious how interested people might be since Tofu Boy isn't exactly the most fun character to play as (though he becomes a lot better with levels built specifically for him).
1 - Factory Fresh (complete)http://steamcommunity.com/id/courier/screenshot/541771335611739878/?tab=public
2 - Over A Maggot Pit (complete)http://steamcommunity.com/id/courier/screenshot/541771335611743352/?tab=public
(featured level on SMW - 6/17)
3 - Dilapidated (complete)http://steamcommunity.com/id/courier/screenshot/541771335611746775/?tab=public
(featured level on SMW - 6/18)
4 - Savage Beasts (complete)http://steamcommunity.com/id/courier/screenshot/541771335611749762/?tab=public
5 - Dusk (complete)http://steamcommunity.com/id/courier/screenshot/541771335611752913/?tab=public
6 - Abandoned Sawblade Factory (complete)http://steamcommunity.com/id/courier/screenshot/541771335663518011/?tab=public
7 - Radio City (complete)http://steamcommunity.com/id/courier/screenshot/541771335611759921/?tab=public
(this is only a small part of the level, which is pretty big)
For those curious: the forced slowness of Tofu Boy actually makes for some interesting stuff because he can end up being more precise and way less slippery than faster guys. It's also fun to do stuff that brings attention to how slow he is and make the player (hopefully in a fun way) escape stuff that isn't really moving all that fast. You also have to rethink many jumps that would be simple with any other character though he can climb pretty well as long as it's between two walls. It's possible to get him to scale a single wall but it's tedious.
Also I don't recommend trying to make Tofu Boy levels yourself if you enjoy any level of skill when you play normal levels. I've been playing almost exclusively as him for a couple of weeks while I have worked on these and I am pretty sure I have gotten worse based on how much I fail when I play SMW levels.