All enemies give an exp reward upon death.
Max level is 25. In an old version of the game the max level was 50.
After reaching level 25, the exp bar turns orange and records glory.
Glory will be a form of end game currency used to buy perks that persist through multiple deaths.
You gain 1 glory for every 2000XP gained afrer level 25. All exp that was gained to reach level 25 does not count towards this total.