Hints for people who are having problems with certain levels: (+ so everyone can see): 1) Use the best suited type of units: if you now many enemy units have a certain weakness to an elemenant, take a hero with units with that element. 2) Place your units in the right place! The Archwizard is best placed in the center of a level because of it's wide range. The Footman, Paladin or Knight are best placed on a spot where enemies need to pass twice and not once! 3) Don't pile your units at the entrance, place some everywhere, to begin place a unit by the entrance, 1 in the centre and the last one close to the exit.