I'm really considering to buy it, just to support Linux Gaming, but I simply don't know what to expect.

Right now I can see someone running through rooms and hitting skeletons with his sword and not much more. I've read what devs are planning to add: http://tom.kot-in-action.com/mwiki/index.php/Features , which sounds good, but I need more details to be convinced :/ Something like screenshots or at least some sketches and descriptions.