When I had an iPod Touch, the first thing I did after jailbreaking was replace my unlock slider with an unlock button. Apparently a lot of people out there are much more fond of sliding to unlock than I ever was; The Falco Initiative have actually turned it into an iOS game called Slide. It works pretty much exactly how you think it would. That is, you do a lot of sliding. What's surprising is how deep the game seems to go with that simple mechanic.
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