Thank you so much for the feedback, I'm glad you liked it.
The game is actually designed to be easier at first. Heroes start with a relatively low health pool, which increases the more you bury. Traps and sabotages are not necessary initially. The problem, if you can call it that, stems from the AI randomness. What I like to call "emergent gameplay".
Sometimes all heroes will go fight at the same time in the same area, so even if they have low health, they will mop the floor with the goblins. Other times, they will all die, and you have to find their bodies and bury them. I was implementing day/night cycle today and as I was testing stuff, two heroes got beat up, ran away and managed to kite a handful of goblins all the way to the village, where they whacked our a few villagers before a guard managed to kill them.