I'm really divided on how to rate this game. On one hand it's a really smoothly-running version of "Freecell" solitaire. On the other there's a game-breaking bug where the timer keeps accelerating (seemingly every time you double click, cause an error message to appear, start a new game, etc.), the timer force-ends a game rather than simply canceling your score, and there's no way to turn it off. Fix this simple bug and this is worthy of three and a half stars. With the bug, I think it's only worth about two (the player can restart the flash application and try really hard not to trigger the timer acceleration, so it's not completely broken in that sense). I've decided to go in between on the higher side, hoping that this bug gets fixed rather than ignored.
I honestly didn't have the patience to try to play without at all triggering the timer acceleration, though, so I have no idea what happens in this version when you win a game.
The one thing I'd suggest -- aside from fixing bugs -- is to note in the instructions that cards may be placed into empty columns... even if this were a common feature of solitaire games, it should still be mentioned, but solitaire games in particular typically only allow certain cards to be placed in empty columns, most often only kings. (This is extremely important to the play of this game, as two free cells and an empty column allow for the movement of a stack of six cards rather than just the three that three free cells offer.)