Ever play Crack the Whip? Get a bunch of people to hold hands in a line. The goal of one person at one end of the line is to push, pull, drag, and yank the rest of the people around, and to get someone to lose hold of their neighbor's hand. It's good fun; the most fun you can have breaking your arm, really. Not that we've experimented with different methods or anything.
Consider then, the case of Gen, a physics game with the same whippy slingshotty action. Your goal is to bring all the yellow cells to the blue goal blob, without hitting the red barriers. What makes this tricky is the way you move the cells along. Click the mouse to turn your green controller cell yellow, and any yellow cell within a certain distance will be attracted to it like a magnet. Clicking again removes the attractive force, but a cell's momentum is maintained. Remember, if you move your mouse away from a group of attracted cells too quickly, you might lose control of them.
Along the game's 20 levels, you'll have to find your way around red blobs which instantly kill off your cells, as well as movable barriers, green forms that repel your yellow cells, and other obstacles. You'll often have to plan your moves ahead of time, so as not to accidentally drag one group of cells into a barrier while trying to manipulate another one. Twenty levels doesn't sound like very many, but the increasing difficulty will keep you swimming around in the petri dish for a while.
Thanks to Ryan for sending this one in!