Thanks everyone. Finally managed to play a game today with the lad and it was fun...but pretty heavily swayed towards the hero.
Basically, the hero has 6 hatches to seal and is facing off initially against 2 shooty vermin. Each turn they roll a D6 and on a 6 another joins in but you can only have a max of 3 on the board at a time. Then when the hero has sealed all but 1 hatch the boss vermin turns up. The game was so much going my (the hero) way so when the boss turned up I let the lad have all the vermin back on the board...the balance completely shifted and I was hunted down.
It's not something that I'd choose to play again though my daughter would like to try it which is cool.
I'm happy with my terrain though...well apart from that wonky bloody table
