Same, I read the rules here on the Itch page and skipped the in-game Instructions since I read the ones on this page below the game :P
The in-game instructions are much more clear.
Edit: Game is tons of fun btw! Love the combination of strategy and luck. I have been playing over and over to try and get to the boss.
(I got stuck twice on Mountain levels because no enemies spawned, I can send screenshots if you want. Tried rolling my dice around the whole map to make sure, and nothing attacked me between turns so I think it's just empty)