How many levels?

[RedPine]

1) How many levels do you need to "win" the game?
2) How many "plus" levels have people managed to survive in the current build of the game, and how?
3) what is the EXP gain rate? Is it balanced to gain a fixed number of exp levels per dungeon levels? Is EXP in multiplayer split or shared?
----
I'm currently banging my head against a wall with this game, and although I'm enjoying the experiencing, I'd love to know exactly how far I have to go.

[Spellmasons]

1. The boss appears on Level 12 (There is a new boss coming in a future update too)!
2. All the "Plus" levels are just for fun to see how far you can get with your build.
3. EXP works per kill (not counting summons or resurrected units)
In multiplayer EXP is shared.

Good luck and have fun! It can be tricky, but mastering the spell system is very rewarding :)