Octagon - A Minimal Game With Maximum Challenge is a 3D "tube" platformer where you move from side to side in a full circle, jumping, moving and dodging pitfalls in an attempt to escape the Octagon.

Playing hardball

Once you've started playing the game, it'll take some minutes to master the controls and much longer than that to actually score high and win. That's compounded by the game offering an Endless Mode where it becomes progressively harder and only the first one is an option. The game offers plenty of replayability, which is great for a fast, reflex-based "time waster" like this one. It's hard and it looks cool in either its Light or Dark theme, though it can cause eye strain if you're older and there aren't many options, either for other themes or for changing how the game plays.

Near-maximum fun

Overall, Octagon is a game that lives up to its subtitle, with a ton of challenge and replayability in one small package. It's worth however much time you spend playing on it, as long as your reflexes and eyes can keep up with it.