Hi Spidey,

one trick I often used in level 4 is to built a couple of watchtowers at the bridge. Built dozens of archers and place them behind those towers. Make sure you have lance carriers and/or Knights in front of them. Then send out one archer to tease the enemy to come across the bridge. BTW, when I say dozens of archers, I really mean 25 or more.

Level 4 is only a teaser of what is to come, so I guess you will be playing K&M for quite a while:)