VIM Adventures is an online game based on VIM's keyboard shortcuts (commands, motions and operators). It's the "Zelda meets text editing" game. It's a puzzle game for practicing and memorizing VIM commands (good old VI is also covered, of course). It's an easy way to learn VIM without a steep learning curve.
You play a blinking cursor appearing one day in a semi text based world inhabited by little people but ruled by bugs. You soon discover that your arrival was foretold by an old prophecy and that you're expected to restore order to the world.