[Open Assets] [Battle] Mario Maps (from SRB2 Kart)

I refuse to let this map die.

Taken from SRB2 Kart (after I asked the others about it and nobody seemed to mind), this pack has N64 Block Fort, N64 Double Deck, and Peach's Castle, all refit for SRB2 Battle! Item placement subject to change, and I hope to add support for other game modes in the future.