Every Second Counts is a game by Ze Frank where you have to hold your mouse button down for a target amount of time (within an error of plus or minus 0.1 seconds). It starts with 0.2 seconds and increases by 0.2 with each level up.
It's less of a game and more of art.
According to Ze: "I use scale as a way to brainstorm ideas around a theme. I try to imagine certain elements of the theme at extreme scale to see if it generates ideas..."
"...Another less straightforward example is the absurdist game 'every second counts'. The increasing stretches of time and anticipation vs. the small gesture of the mouse button. I find this juxtaposition of scale in things that make me laugh... For example the crude and silly joke: 'I have to go poop.' stated seriously followed by an utterance of the word 'poop'. It only works for me if the sound is small. A little throw away."