QWOP - Run. Or attempt to. This is the type of game that's as fun to fail at as it is to do well! The best part is the Chariots of Fire theme that starts up if you begin to do OK, and abruptly stops one you start faltering!
Splitter - Get the ball to the goal by slicing up anything in its path!
Hanna in a Choppa - Fun little game with lots of quirks and plenty of awards to earn. Use the choppa to fly around and perform a variety of tasks.
Zilch - Did I say the last game had lots of awards? I take that back. Zilch has 120 awards total that can be earned! A flash version of the famous dice game Zilch (aka Farkle). Quick version of the rules for those not familiar:
Start by rolling 6 dice. 1s and 5s are worth points, as are certain other combinations of dice. You must bank at least one die (collecting its point value), and then you may re-roll the rest. Continue until either
1) all 6 dice have been banked, in which case you get to roll them all again and continue to add to your score
2) no scoring dice are rolled, in which case your banked points vanish and you get a Zilch!
3) you have banked at least 300 points and decide not to risk Zilching. Your banked points are added to your permanent score.
First to 10000 wins!
Incredibots - Build robots to get stuff done. For the mechanically inclined.
Mirror's Edge 2D - Great momentum-based platform game, with vast leaps, swings, wall runs, etc. Currently in beta, so there's just the one level. The controls are wonderfully fluid, making it easy to leap tall buildings in a single bound... or something like that.
Bubble Spinner - Like Snood with rotational inertia!