The No Ads option is included into the Gold Deal.
Open Magic Puzzles -> press My Collection-> then you will be redirected to your puzzles collection page. The upper bar can be scrolled to the left/right. Please find the Gold Deal sign and press it.
This in-app purchase also includes 3 beautiful puzzle packs: "So Magical Sky", "Animals in the Wild", "Paradise Dream and ability to create puzzles from your own pictures.