Similar concept to the 1970's WHICH WITCH? game by Milton Bradley that's a good idea....
"What if Vul-Kar himself were devilishly sly about where he sent those fireballs flying? The team devised a design for Vul-Kar’s interior piece that splits the chute into three directions as it leaves his mouth. His imposing lower canines provide perfect dividers. Now there are three potential exit points for each marble that Vul-Kar spits out. There are five different paths that begin at the top of the island. You can turn Vul-Kar so he faces any particular set of three paths. When you drop a marble in, it will go down one of these three possibilities. But we didn’t want to leave the marbles to pure chance. The team spent weeks tweaking this interior design so the marbles most often exit the center path, while occasionally spitting out one of the side paths. While players can never be certain which path a marble will take, they can certainly “play the percentages”."
"What if Vul-Kar himself were devilishly sly about where he sent those fireballs flying? The team devised a design for Vul-Kar’s interior piece that splits the chute into three directions as it leaves his mouth. His imposing lower canines provide perfect dividers. Now there are three potential exit points for each marble that Vul-Kar spits out. There are five different paths that begin at the top of the island. You can turn Vul-Kar so he faces any particular set of three paths. When you drop a marble in, it will go down one of these three possibilities. But we didn’t want to leave the marbles to pure chance. The team spent weeks tweaking this interior design so the marbles most often exit the center path, while occasionally spitting out one of the side paths. While players can never be certain which path a marble will take, they can certainly “play the percentages”."