what hagbard said ... it's mostly techo stuff and emulators ... there's a few games.. let's see, there's a chess game, a bird game, some board games, a pong game, and tetris to name a few. Not very complex stuff, after all it's homebrew.
The emulators (if you're interested) do GB/GBC, NeogeoCD, Neogeo Pocket, NES, SNES, SMS/GG, and some very primitive MAMEs.