Not bad but not great
It was a pretty good game, but it could do with a few tweaks. First of all, every time i went off the screen, my points went down. Way down. Is that supposed to happen? (you might want to have it so that when you hit the right side, you come around on the left side)
Second, i think you should get bonuses after like 1000 points, 5000 points, 10000 points and so on. You know, like destroy all red bricks, ect.
Another thing that was a little annoying was that the blue pixel would always appear on the side of the screen, where red blocks would randomly appear. You might want to have like a warning system or something to show when red blocks are supposed to come.
Anyways in conclusion this is a pretty good game. May you be able to write even better ones! :)