Playing ads in the middle of a level is very disruptive and interrupts train of thought. Having a timer is stressful. No music is erie and raises tension. Having certain items that are 95 percent identical (4 shark heads, 2 are dark blue and 2 are cobalt) is unfair trickery. I thought this was a relaxing brain game. You could have at least given players the option to disable the timer and be given a reduced reward as a result. Give the option of music. This is disappointing - Uninstall.