OMG! THank you so much! About the HUGE knights, they are very tanky but deal almost 0 damage, the main damage is the archers. You can use the wind to bring the archers closer to your units to kill them first or wait for the next 2 waves, there will be a massive TNT wave, you can use the wind to push the TNT goblins back to blow the archers up! And the end is at week 50, there will be a final boss, kill him and you win~!