I'm in, dibs. take a look at some of my projects for examples and screenshots of my work
also, for the terrain section, if you want to get real crazy you can always use the texture overlay system, just import images of ground textures, or even entire 8 bit maps and texture them to a decal model, then you can use it as ground texture. It's the way people do the 8 bit terrain like in that old zelda project way back when.
Hardest part would be getting grid based movement working properly, and taking into account blockers, heights and whatnot