There's a lot of crazy stuff to play in this edition of Mobile Monday. Seriously, if you're in a bad mood, or if you haven't smiled yet today, you probably shouldn't even read about these games. 'Cause they're wacky.

Mad Skills Motocross - The very same folks who brought us the delightful Mac/Windows/Linux version of Mad Skills Motocross have managed to shrink the game down for iPhone users to enjoy! The classic bike racing physics stunt game fits perfectly on the small touch screen, with simple controls that let you control speed and direction on either side of the screen. Take jumps carefully but quickly, and perform tricks in mid-air by leaning one direction or another, and then you add something like turbo boosts and things get really interesting. It's a simple but perfectly balanced game that will keep you coming back for more time and time again. And then again.

Burn the Rope - It may not be You Have to Burn the Rope, but this little puzzle game is still a lot of fun. A length of rope is piled on the screen, arranged in a unique shape. Touch part of it to start the burning! Flames only burn up, so you have to rotate your iPhone in order to keep things moving along. Soon, colored flames and colored ropes enter the equation, adding a real puzzle experience to the firey mix.

GeoSpin - A puzzle game of a different sort, GeoSpin features a centrally-located polyhedron with different colored faces. Around the perimeter you'll find several shapes that come in unique colors of their own. Use your finger to rotate the polyhedron in any direction, then drag one of the surrounding shapes over to try and match a side. Get both the color and the shape right and that face vanishes. Rotate, match, and repeat! Time- and score-centric modes ensure you've got the kind of puzzle challenge you're gunning for, and even though the music is a bit cheesy, the experience is unique and worth the paltry price of admission.

kijjaa! - Here's an interesting idea: turn your iPod Touch/iPhone into a game controller to play a browser-based shooter! kijjaa! does just that, allowing you to control a craft in 3D as it flies on your computer screen. Use the buttons on your iPhone to fire your weapon, and tilt the device to move around. The gameplay is frighteningly thin, and after a few minutes the novelty of the game will wear off. But you've gotta admit, the concept is an interesting one! Grab the game, then go to the game's website to start playing.

NOTE: Games listed may not be available outside of North America. Prices are subject to change and are therefore unlisted. Please see the individual game pages for purchasing info.