Yo, I’ll try and do the compo in Haskell using the Graphics.Gloss and HTiled libraries. Because they are essentially not compatible at all, I had to create some terribly hacky glue code, which you’re free to inspect under https://bitbucket.org/safod/ludumdare31 . There is also some additional basecode, but it’s all very basic – I’ll have to implement almost everything from scratch, and I don’t even know yet how I’m going to play sounds!

Fair warning: the basecode relies on scripts for the Fish shell, the arcane imagemagick syntax, duct tape, regular expressions, the internal workings of both libraries, and prayer.
Still better than not having tiled maps though!

Good luck to everyone!