This isn't something done for internet shits and giggles. It's an "official conversion" of awesome death simulator Canabalt running on... the Commodore 64, one that will soon be going on sale. Like, it'll come on a cartridge. Amazing.
If you'd rather just play it on an emulator, you can do that right here.
C64anabalt - Official conversion of Canabalt for the C64 [YouTube — Thanks Nightwheel!]