Cactus is renowned for developing inscrutable but progressive games and concepts in just one or two days; Mr. Podunkian claims to have been developing games since he was 5 years old. Thus this joint experiment, cranked out for the regular two-day theme challenges at Ludum Dare, is about as indie as it gets, and “horribly hard” is a spot-on assessment, too. In the sidescrolling platformer, players have only left or right arrow-key movement and a jump of miserly height—it’s as coarse and crude to play as its flickering green-and-white graphics and clomping old-school music. Exuberant captions narrating each screen suggest the developers’ amusement at frustrated players. It’s well-constructed sadism, but the number of players likely to make it past the first two or three screens—let alone feel like they’re in on the conversation—is depressingly small.