You simply have to guess the card color - black or red. Play at Casumo Casino Energy Casino Loaded with good mood and tons of energy, Energy Casino will appeal to any gambler. The games are intended for an adultaudience. Then, you should choose a betting strategy and stick. The casinos on our list have superb mobile platforms that fully support any Android or iPhone device. Watch as the computer shuffles a deck of cards and proceeds to reveal four cards in a row. Book of Ra Deluxe, a classic slot that hasnt lost its popularity even after all these years.