contrary to what literally everyone else said, you don't have to hit the ? block in -1, all you have to do is when you get to the 3 plankton parts, jump on the very edge so you don't hit them, and then bonk the last 1 of the next 2 row enemies (a red jellyfish 2 line, and then I think a green line) I'll edit soon with my PB so you can see it.