It's an MS Paint adventure. There's this fella, Andrew Hussie, who makes up convoluted games in the style of old-school text adventures, and illustrates 'em in MS Paint. Bit like a cross between Hitchhiker's Guide to the Galaxy and Sam & Max, in webcomic form. People then suggest what the character should do next, and he picks his favourite suggestion, illustrates it, and asks again.
Jailbreak was his first, and a very faithful send-up of the genre, but since then he's written (and finished) Problem Sleuth, where a hard-boiled detective is stuck in his office, and Homestuck, which is a story about a kid stuck at home. These tend to become stranger with each consecutive panel.
https://www.mspaintadventures.com/?s=1There's Jailbreak, which is relatively short, if unfinished.
It's basically - I don't know if you remember orcus's John the Explorer thread (which has apparently been - hold your breath - tragically pruned D: ), but it's that, on a much bigger scale.