Game Rufus recall online

Small bobrenok named Rufs has memory problems. You can help him. You have to train together, so it will be fun and rewarding. Your task will be the following. In front of you is not much of a growing structure, which consists of bilateral blue cards. On one side of the drawings. You must open them step by step, and find a couple of them, and then they disappear. Memorize the cards and try not to make mistakes, to avoid wasting time. Your main task will be as long as possible to keep the growth of structure and not allow it to touch the top. Then you lose. Well, shall we start?