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A tower, surrounded by a lava-filled moat. You can leave the tower to grab the big weapons, but the bridges are narrow... careful firing that spnkr, you might end up in the drink!

A simple 5D arena (or pair of arenas, to be more precise). The name comes from the orientations of the hills (which aren't actually hills, unfortunately).

Pillars, lava river, lots of ways to die. There are a couple of elevated rooms off the sides, with 2x rechargers in 'em... careful, 'cause they're guardable. (Also watch for a weird bug if you leave too fast... you can end up in a glass cage at the bottom of the stairs.)