The links below will guide through each of the levels.
Forgotten Tomb Edit
Each of the Forgotten Tomb levels have the same map, and the same 10 waves of monsters.
Dragon's Lair Edit
The Dragon's Lair levels will have you face off against various dragons.
Boss Rush Edit
Each of the Boss Rush levels can be attempted (completed: note that if you fail/die, it doesn't seem to count as an "attempt" - only actually completing it does so) twice daily.