Control Tasha with [WASD] or the [arrow] keys, and move Snoopy with the mouse. Collect floating icons with your cat cursor, and you can use them to create platforms out of thin air. If you make a mistake, you can use the [-] key (minus) to zap back in time to just before you placed the last platform—a very nice feature, if not entirely ergonomic.
True, Tasha's Game is relatively short, but I pretty much decided it deserved to be featured after a rosy-cheeked tree in the game complained that I was standing on its head. The platforming controls are simple but smooth, there's a full bevy of hats to collect (they're actually called "Pointless Unlockables", in case you're still wondering how seriously the game takes itself), and the shocking final boss encounter is, frankly, amazing.
Also, the title is randomly generated every time you play, so reload the page a couple of times for extra value. I played it while it was called "tasha's final karate zero", which, logically speaking, makes me the coolest person alive.