Player 1 crawls the dungeon... I mean, caverns. His experience is all up to Player 2 (he who wields the mouse), who designs the next level while player 1 crawls the previous one.
This is an experiment I've been wanting to try for a while, although I originally imagined it as a platformer. The idea is, hopefully, some interesting interactions will emerge between the people playing, kind of like how we used to take board game sets and invent completely new role-playing games from the pieces when I was a kid.
I want to revisit the idea and try it with a few other genres some time soon.
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I've just updated the game to include saving/loading and 9 single player maps. So it's now possible to play solo. Please note that this was added post-compo.
PLEASE NOTE: this is in the readme, but worth mentioning again: the buttons at the bottom are operated with a double-click, so you can't accidentally wipe your level.