If you've got five minutes to kill and want to feel like you can't even follow the simplest of directions, then why not try your hand at Arrow Hero.
The in-browser game, which also works on mobile, has a very simple premise: just press the direction that you see using the four arrow keys on your keyboard, up, down, left and right.
However, it's more difficult than it sounds (at least it was for us) even though it's just "a minimalist game where your goal is to match your inputs with an unstoppable continuous overwelming flow of arrows". For some reason the colours confused us, we don't know why.
It eventually gets faster and faster the further you go into the game, but there is one secret trick, as outlined on the game's site, if there are several of the same arrow in a row, you only need to press the key once, until it changes direction again.
Honestly, it's more addictive than it sounds.