If you are not constantly touching the game, you are bombarded with constant ads, so don't stop to study what you are attempting to match. The constant ads destroy what seemed like a very fun game, great for color theory learning, and a lot of fun to this artist. The ads destroyed the experience completely by being constant (and I do mean constant - watch an ad, pause to look at the object you are attempting to match, and another ad pops up - unless you are touching the screen.