Great game, couple of sugestions though:
a) traps are really usefull now, please add an 'Craft traps if idle" checkbox to foremans,
b) weapon upgrades hurt more then help for the most part, right now it's better to wait until you have 2 or even 3 of the same upgrade before you use them. i.e. insteed of upgrading dagger from I to II, just keep adding levels to it until you can upgrade it from I straight to III or IV.
By the time I got to world 19 I had Mace, Helmet, Polearm, Pants and Battleaxe IV, and all those had 0 levels (aka no HP or DMG from them). If i kept them at III, i would have much higher HP/DMG.
 "Trimps"){kind=icon}