Nice entry!
The dungeon works semi good as well as the combat.
Moving around buffers up infinite movements which lets the player bumb into walls repeatedly when miss-moving. I did a similar thing on the jam 3 years ago and try to stay away from that now.
The Combat works nice, but since only one of your character can move each turn, you kinda just use the ones with biggest reach and the ones you got and used in the beginning will just be left standing at their init positions.
I like the essence upgrade rooms but the upgrades were very plain, maybe these could be modified someway to become more interesting. The chick in combat were a random addon, but hard to accommodate for when trying to do tactics. So I would have it more predictable or remove it. Actually I would like to have the entire enemy movement and attacks a bit more deterministic so you can plan your actions and use more strategy in general. I would still like the combat length to be fairly short since they are random occurances.
I liked the save system, and thats the only reason I completed the game, since I had to stop playng after reaching the final level and come back to it another day. Super nice.
The full screen mode was a bit wonky for me. It changed one of my screens resolution and the computer struggle every tme I tabbed out of the game or tried to do stuff on my other screens. If possible make it run in windowed full screen mode or similar.
I guess the story is fine, but I had some trouble immersing into it, but maybe that's just a me thing. Maybe a bit to much text for my taste.
Thanks for the game!