It took me a while to complete the game, but I'm glad I did. Really engaing RPG that just oozes style, and the music just rocks, I think you did an amazing job.
The game does feel a bit intimidating at first, and I recommend newcomers to utilize items and magic more, they both can help you steamroll through the undead soldiers. I genuinely like how the game forces you to use every mechanic it presents to you (reminds me of how SMT Nocturne forces you to learn to buff & debuff in order to progress), but I get that it can be challenging to players that aren't into JRPGs. And yeah, I know everybody already mentioned LISA, but that battle UI looks like it was lifted staight from the game)
The only downside that comes to mind is that the entry doesn't feel very... Ironmouse-y? Like the theming had been tacked on to the game. Still I enjoyed your original story a lot, and hey, if there's an Ironmouse in every universe, who says it can't be a part of another game series' lore, right?
Great job and well done!