I really dig the clean graphics and atmosphere, they read very well. It somehow remembered me of Ultima Underworld.
The controls and grid movement felt very tight and had a nice feedback to it if you hit something you cannot go further. I love the possibility that you can drop down a hole or climb it up again, that’s really cool.
The Xp mechanics are interesting. So you get rewarded by moving around. Why not :) I really would like to get Xp, while forced to listen to the Sisters banter tho ;)
The UI and quick controls looked and felt very nice. It had a nice touch to that you can move it!
I had really trouble to open the Dungeon Door by the chain. Somehow the bounding box did not respond very well to hover. It somehow works in the very upper part of the chain. Also the crystal within the dungeon that is suppose to open a door does not work either. :(
The fake wall looks really nice! That’s a cool mechanic. I think it could be used a lot but the party member should just hint it once so the next time you encounter one, you have to find it yourself!
The dungeon music was quite fitting the dark atmosphere. Nice and eerie!
I would say the combat was okay. It was missing some sound feedback and I did not really know what skills to use when. I liked the first monster and the boss looked really nice, but I could fight him, as I wanted to move before him, I was ported someplace else :(
The constant banter of the girl is an interesting Idea but it gets really annoying fast. She even talk over the dialogs of the NPCs or even if you’re in combat, which is very rude of her and in case of the combat not very fitting! I think it could work if her banter is more context dependent. Like if you standing for a looked door or chest and fail to open it, then she could mock her brother for not be able to do something ;) - As I proposed you before, I would like to have a special skill to shut her up temporarily :P
But despite my previous criticism, it was a successful and fun realization of the theme. Job well done!