Niagara Falls (Yggdrasil Gaming): Features Don't let the aged look and basic setup have you fooled. This slot machine is nowhere near as simplistic as it appears to be. All in all, askmebet เว็บตรง there are 3 bonus features included in the game. The first one is the Coin Drop Bonus feature which triggers when a gold coin appears on the 5th reel on a base game spin. You will then see a coin tumble down the reels while leaving a trail as it finally drops into one of the 5 bonus slots positioned just below the reels.