The bug that ended my playthrough is in World 10. There is also screen flashing throughout. For the most part it's just annoying but at times it makes a level borderline unplayable like in the castle of World 6. With this hack, there are some graphical glitches like sudden pallet swap/inversion during levels. There are some fun levels but I mostly didn't enjoy myself. The awful reverse control level trope shows up. There are gimmick levels like minecart rides and windy levels.
Butt Jetpack Mushroom-I'm not sure what it's called but it gives Mario a fart boost upwards if you jump again midair, it's controllable and incredibly useful In addition to the normal Fire Flower and Cape, there are a bunch of custom powerups.
Pressing L on the overworld uses a Warp Whistle to bring Mario to a world select area. There are SMB3 sprites mixed with SMW which isn't my favorite but at least Mario is the SMW sprite. The bosses are all different skins for the custom 'jump on 'em 5 times' Koopa Kids.
