First downloadables for building levels for my dudes are ready - it's background layers for Cake Valley which you can stack to build an infinite side-scroller background with infinite amount of cakes.
I'll upload a cake tileset for platforms in about a week, hopefully.
I've planned to create at least 5 biomes for my frog characters.  Each biome will have its own platforms + backgrounds and a distinctive color palette but I think they'll all share the same items and enemies.

Biomes planned now:
1. Cake Valley
2. Chocolate dungeon
3. Jelly Forest
4. Frog village
5. Butterbeer Falls