Sometimes you roll along, having a pretty good day... and sometimes, you just want a giant worm to rise up out of the ground and destroy everything. Super Mega Worm is for that second type of day. (You'll have to find something else for the first -- Doodle Jump, perhaps?) It's a game where you control a gigantic worm on a 2D field. You use a slider (or the accelerometer) to direct it through the soil and up onto the surface of the Earth, where puny little humans await their inevitable destruction. The game is funny in a morbid way; you end up cheering for the little worm as it grows (and learns new abilities) over time, and eventually, you'll find yourself reveling in the destruction of the human race.
Quality pixelated graphics and excellent sounds help immersion a lot, and the control scheme is surprisingly fitting for the kind of movement that the worm does. There's even a little mini-game in jumping off of various vehicles into the atmosphere and exploring the game field in both directions. Super Mega Worm isn't really a title for the faint of heart; even though the graphics are pretty retro, things get gory fast. But if you've ever found yourself laughing at or cheering for the monster in a horror movie, Super Mega Worm will probably dig its way into your free time. The game is US$2.99 on the App Store right now.