The mechanic, where after some mining actions game gives me option of placing 2 rooms in random places is very satysfyng for me. Would you like to create a city builder, based on such mechanic?
I had very satisfying 10 turn battle, where I almost died. Then I met 2 fire Geckos and died instantly. For me backpack hero is the successor of Diablo were I also spend most my time analysing the loot : P
