At first I was annoyed by the timer in infinite mode, but then I played for a while and realized it's necessary; I could lose SO much time playing this game, it's deeply relaxing / meditative / hypnotic.
After playing it for ten minutes, I had to delete it from my computer. NOT because I didn't like it, but because I liked it too much. I have OTHER things that I want to do dammit, I can't afford to spend all day just playing this. So, you did a good job with the game design. (Sorry I'm bad at compliments.)