Unfortunately this is just too simple to be worthwhile. From the name "Color Collision" I was expecting there to be some kind of system that centered around combining colors, or scoring bonus points by building up streaks of the same color, so just running around hitting every block indiscriminately was a bit of a disappointment. Despite there being multiple blocks and random spawning, in practice the game plays almost exactly like Pong.
First of all, I disliked that the blocks have to hit the registry point of the player, rather than touching any part of the sprite. This made it feel just a little bit harder as you have to wait just a bit longer for a block to fall into the registry point, or move just a bit further to the side to catch a block before changing direction and speeding off toward the next block.
That aside, I disliked that the random position and speed of the blocks made it impossible to avoid losing lives. In addition, the whole game is pretty slow, making the process of scoring 100 points more tedious than difficult.