If you're really good, you can complete Super Hexagon in 6 minutes. It took me 30 hours.

Heh, it's a funny story here... I DO agree that the soundtrack is great but I only ever started playing efficiently after muting it. Seriously, it distracted me a lot

(I assume that the 30 hours includes the time it takes to learn the game, and not just the time of your successful run, right?)

Anyway, this reminds me that VVVVVV has a Super Graviton mode, where you have to survive as long as you can (and 5-minute survival isn't particularly likely). It needs to be unlocked, but there's a menu option (under "accessibilty options", I believe) that allows you to unlock the secret lab where it lies right away; unlocking the minigame and having some fun with it is something that could be realistically done in under 5 minutes, I believe.