You can explore the game up to 300 feet, after that you'll need to buy the Web version.
Each male/female pair of classes is just $1 in the mobile version, so you can buy just one to take WazHack on-the-go, or go crazy and support development even more by buying the whole lot!
The Android version also supports Android TV.
Eggs have a number of uses which you'll want to work out as you play.
Belief systems vary between classes and character alignment, though some classes have the same belief system (for example the Valkyrie and the Barbarians both believe in the Old Germanic / Norse gods). The belief system is accessed through the "Cast" action (now a green aura not a spellbook). In general, beliefs are designed to be last-resort emergency measures, so for example the Knight can only pray to "The Big Guy" after he has played (and so dined) for quite a while; praying early will reset his timeout; other classes have worse consequences for calling on them too frequently, while others have no difference in consequence.
Check out this quick WazHack gameplay video. The game isn't quite as "hack and slash" as depicted in this action video, since you really need to pay attention (don't just keep whacking away when a goblin with a giant club walks into the room!).