I think my biggest regret with SMSB was not having a Bowser's Castle stage included by default with details about it specifically being a later job. I'm not too pleased with how the stage turned out conceptually (no offense, Janx) and even if I did like it it'd be kinda unfair that it only really got in on virtue of being the first submission of an extremely obvious concept - though I will certainly say it's better than the layout I made for the NES Bowser's Castle stage, which I really should've thought out a little more before submitting, reminds me a lot of those cursed Melee beta stages with it's ridiculous hazard and dumb wall placement.