Pachio-kun - Puzzle Castle is one of those weird little Game Boy gems that never left Japan. You're basically stacking blocks Tetris-style, but with a twist—you're building a castle while this little dude Pachio-kun runs around like he owns the place. The blocks have these medieval designs, and sometimes you'll get a flag or a tower piece that really speeds things up.

At first, it feels slow, but once you get a few layers in, the game starts throwing curveballs—like blocks that disappear after a few seconds or ones that only fit in specific spots. The music's got that classic Game Boy charm too, all bleepy and weirdly catchy. It's not as frantic as Tetris, but there's something satisfying about watching your castle grow taller while trying not to mess up the foundation.

Definitely one for puzzle fans who don't mind digging into obscure Japanese releases.