Kurukuru Kururin is one of those GBA games that looks cute but will absolutely wreck you if you're not careful. You control this little spinning helicopter thing (the Helirin) through these ridiculously tight obstacle courses—one wrong twitch and you're scraping against walls or getting smacked by moving blocks.

The first few levels trick you into thinking it's easy, then suddenly you're threading through laser grids with millisecond timing. The controls are simple—just left and right to rotate—but nailing the precision feels so good when you finally clear a level that's been stomping you for half an hour.

Also, the music? Weirdly catchy. You'll catch yourself humming it after a while, probably while replaying the same stage for the 12th time. If you like puzzle games that actually make you sweat, this one's a gem.