Interesting concept, I couldn't figure out if there was a way to know there was a bomb nearby? I got blown up a lot. Lots of my bones left down there for the other Archeologists to dig up :D
I think of the upgrade feature like this but the game loop idea is with blowing up. Once you open a couple levels eventually games over . Next round you have a bigger map and bigger treasure conversion rate kinda compensation for blowing up) at least it was such idea