The game has encounter mode (the bottom item of single player mode and the whole multi player mode). The number of maps is limited and it does not seem to support automatic generation, but the editor seems to be able to generate and create new maps.

Kinda late to answer, but may still be helpful. There's no random generation in the game, but you can create your own maps if you learn how to use the Editor. It's not that hard, you'll just need some imagination.

Hope it helps