When you see "Smashed the stack with a 0x001f byte SETUP request!" does anything show up on your Switch screen? Mine is blank with the same output.
This is the only search result (other than 1 Korean site) that has 0x001f byte in the output - apparently it's supposed to be "Smashed the stack...
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan