easy

but entertaining. You should mix it up and not have the blocks always coming from the same side, or have them scroll any other way but right to left. I think most people are quite adept at processing information that is passing that way, so making the blocks go left to right, top to bottom, or bottom to top should make it a little tougher. But again, switch it up now and again so it stays fresh and players don't get to comfortable with how the blocks are scrolling.

I like It =]

Simple but really nice concept.

Keep it up

Simple but fun!

This game was more fun than what it first appears to be. The only thing that I thought may have been a problem is when you click a blue right before it reaches the end of the screen the animation doesn't finish in time and it counts as a loss.

But other than that good job!