Let me guess, you played way too much Minecraft?
Dungeon had nice placement. Enemies were in good positions. The maze structure was great. I'm guessing it was hand made and not procedurally generated. Not sure what you had in mind for the collected items, perhaps some kind of crafting? Movement and mining were fast and snappy, so the game never got tedious. Though I did take a look at the map to get the progress more quickly.
Graphics, animations, musics and sounds effects were all well done. I appreciated the little touches in the bedroom. Only criticism would be to remove the AI voices. I don't think they added anything of real merit to your project. Retro games have no reason to require voice acting, text is more than sufficient.
Overall, it was very enjoyable.