Its a nice attempt on the dungeon crawling genre, the aesthetic is great and the sound effects are well suited.
On the fighting part, I'm not sure if I'm really fan of the turned based RPG mechanic, since we're already on a grid based Dungeon Crawler, having the fighter happening in the dungeon itself would be more immersive and would less harm the rhythm of your game, and the fighting music is very cool but takes me out of the mood.
If you really want to keep the RPG mechanic, I recommend you to invest more on its integration into your game (maybe keep the same scene as your dungeon but lock the player and show the fight for example)
If you work on this part and find idea to extend your game, I'm sure you will be on the right track :)