Bank or Prank is played on a standard 5x3 grid with 243 paylines. The symbols consist of the bank manager, the jester, the money bag, and the playing cards from ten to ace. Special symbols include a gold coin wild, a gold and blue coin crazy wild, and the dreaded bomb. All wins pay from left to right. The game is set in a modern city's business district, with towering skyscrapers against a clear blue sky.
The reels are positioned in front of the grand entrance to a traditional bank, complete with Doric columns, lion statues adorned with jewels, gold chains, and crowns. The colours range from the bright sky to the bank's pale marble exterior. Against a marbled background, pastel-coloured symbols spin on the reels. The bank manager is a classic portrayal of a grumpy, cigar-smoking boss. A mystery win takes you into his office, where he counts piles of gold coins before your winnings land on his table, accompanied by a circus jingle.
To activate the mystery reward, you must collect all three question mark symbols during a game. When a symbol lands on reel one, the corresponding container on the left-hand side will light up, indicating that the symbol has been saved. Once you've collected all three, the mystery reward is yours. Keep in mind that mystery symbols only appear on reel one.
The crazy wild game is triggered in a similar way. You must collect all three crazy wild symbols during a game. When a symbol lands on reel five, the corresponding container on the right-hand side will light up, indicating that the symbol has been saved. Once you've collected all three, you'll win 10 free spins. During each free spin, wild symbols will randomly appear and lock into place, increasing your chances of winning. However, be careful of the bombs that appear on reels one and five. If they land on a row with previously collected symbols, those symbols will be lost.