This could be a good framework for a puzzle game. I agree that I don't think the timer is necessary, and right now there really isn't any feedback except the score count. I think the color scheme is a bit hard on the eyes, too. I do like the premise though.

It was a little confusing at first, and the timer felt a little unnecessary, but overall it was a nice little game. The highest score I got was 11, and I'm pretty proud of it because all the other scores I got were in the negatives haha!