The wave is going to be a major part as it serves as a main toy, space filler as well as a ramp and all going well will feed 2 different ramps - which will be determined by the power of your ball hit up there. This is the goal anyway.
first image is my attempt to model a basic wave, then next 3 are to slide the wave on to the playfield to aid in the visual and the direction I want to go.