Today in gaming: I know what you're thinking -- why would I want to chuck muck? Well, don't worry. Chuck isn't a verb; in this case, Chuck is a noun. Chuck is the muck, and your job is to help him along in his quest by using your finger to pull goo into bridges, sling shots, ooze cannons, and other useful objects. Chuck will collect crystals as he goes along, but be careful of the guards -- they don't like his high-flying spirit.
The game features forty challenging levels across four worlds (at least one of which is an exploding volcano). You can pick it up in the iTunes store for free!