yeah, use the colors, if you hit your same color; or some kind of target color then something big happens. The big color wall doesn't always need to be at the end too with the ricochet mechanic. It could be around a corner, or on a roof. You could show the top down level (kinda like a minigolf course layout) then zoom into the player start and let them go. Some colors could act as propulsion, like an explosive, giving the player more momentum to reach the goal.