postgame% complete the game as fast as possible (32 icecreams no major glitches) and then go to the remaining worlds after you beat the game to get all 54 icecreams

sounds like 100% but you beat the game in the middle of the run instead of the end neat idea though

it doesn't sound like 100% it is 100%, strats are probably to just do 4 worlds 100% and the other 3 after sun