time waster - 'escape the room' point and click game
This game is 3 in 1. There are three objects to choose from at the start to help you escape the room, and whichever you choose determines the solution that will get you out of the room: camera (easiest), paper (harder), and power core (hardest).
http://www.flash-game.net/game/3006/prism-core.html
There's a walkthrough for each level, very nicely laid out with spoiler tags so you only have to look at one hint at a time if you get stuck.
http://jayisgames.com/archives/2007/11/prism_core.php#walkthrough
I love playing these games, even though they make me feel totally dumb sometimes when I overlook things that are so obvious in retrospect. :)
Happy Saturday!