It's nearly the weekend, so have a miniature carnival on your desktop with Smile While – a little app that fills your screen with gaudy streamers, bursts of confetti, 3D shapes and inflatable animals that spin and bounce in a pleasing fashion.
There's no goal or fail state, so it couldn't be called a game. It's more like a virtual piñata, without the violence inherent in whacking a papier mache donkey with a stick.
Clicking your mouse or tapping a key will create a random shape and play a cheery piano note, while the background shifts through a jolly spectrum of colors. That's pretty much all there is to it.
Smile While is available for both PC and Mac. To give it a go, download the appropriate version, extract the file archive and run the EXE file.
Download here: Smile While