a little tricky at first, and the scroll wheel tends to get in the way when using arrow keys, but all in all its very fun!! its resposive and fluid and the only real issue would be your reflexes! the only thing i could suggest would be using more than 10 seconds of music as it can get old fast but its very good all in all! pleasant graphics, nice controls, a nice theme! i'd suggest it to anyone looking for something to kill time with!