Great start here! I've thought about tile laying in the past, particularly with some dominoes based games I've developed, but the UX is hard to get right. Moving and laying tiles felt great here - very fun to build the world you'd explore in real-time, and satisfying when you could make a nice big ol' dungeon to explore.
I did notice some highly frequent random encounters as described by another commenter, but it wasn't exactly game breaking - seemed random, just high frequency at times. I never found a way to access the scroll, but it was nice to build worlds with easy access to multiple fire spells and bombs. A quick rebuild after collecting items would let you stock up.
Ultimately, would be great to see the world be more inhabited and combat more strategic vs. "bump and pray." I could definitely see myself coming back to a fully fleshed game based on this!