As a fan of old dungeon crawlers, I love how you managed to recreate the style, but I have a couple of suggestions:
1) add a sidestep button to move left and right without the need for turning, it helps dodge attacks and move faster
2) if you can, make it so that the party moves to the center of every land square, unless you want to do something with the transparente windows (it is a pretty cool thing btw, you can also try what they did with elder scrolls arena and add transparency to keyholes)
3) add an icon to the chests so that you can identify who benefits from them
Hope this helps, keep up the great job!!!