Roll-A-Ball: Reference Gathering and Game Design Post

For my Roll-A-Ball game levels, I will be doing a rolling game with a top down view. The objective of this game will be to get to the other side of the map without falling off the map. To make this interesting, the first map will be the easiest, the second will be a medium difficulty and the last will be the most challenging. The textures that I will need to make these maps are shown below. I will make one of these maps of all glass, another of an icy look/texture, and the last maybe a dungeon look.