@Radius Poe: My incentive for playing a game hinges on my strategy affecting how well I do, rather than a roll of the dice. What you are advocating is removing the player's ability to affect the outcome of the game.
I used to never see lag on this game. And that was with a less powerful computer. It's like either the game (or the Flash player) is system checking and inserting deliberate lag. I'm not entirely sure of the cause of the lag. But "check your computers" is unhelpful.
There are too many levels where you have to be "fast enough" for it to be a proper puzzle game. Look, I realize that I'm not good at (for example) shooters, where you have to click all over the place quickly. But this is billed as a puzzle game. And for that, the challenge should be in figuring out how to solve it, not in "if I could only click fast enough."
FinalHero: While it is true that I have gotten a new computer since I used to play this game. It is a more powerful one. There is really no excuse for the controls locking out unless it is a programming error. So the programmer really should be able to fix it. (It is, however, possible that it glitches on multiple processors.)
You can only charge up one character (2 for blue) at a time. There should be a way to get more than one color at a time. It might be better suited to a swap puzzle where a combo can charge all your players.