Ever played one of those simple but weirdly addictive number puzzle games? Numpla Advance is exactly that—a no-frills, straight-to-the-point math puzzle game for the GBA. You get a grid of numbers, and the goal is to clear them by matching sums or multiples. Sounds basic, but it’s the kind of thing that hooks you when you’re waiting for the bus or just want to kill a few minutes.

No fancy graphics or story here—just clean, fast-paced puzzles that ramp up in difficulty. The Japanese menu might throw you off at first, but the gameplay’s intuitive enough that you’ll figure it out after a couple of tries. If you’re into retro puzzle games that don’t overcomplicate things, this one’s a solid pick. You can even play it on an emulator if you don’t have the original cartridge lying around.