Not a bad effort for a first published game, I admit I'm not a huge fan of RPG maker games, that might just be me being worn out from them over the past 6 years in jams lol.
But this was kinda interesting with the randomized rooms, though frankly I think the rooms themselves are too big and sparse. There are items to find, I found I think 3 drops, but that's across over a dozen rooms, several of which are pretty large.
And while this is more of an aspect of RPG Maker itself, the combat isn't that entertaining. It's not awful, it's rare I encounter an RPGMaker game with truly bad combat, but I've never been wowed by it.
Just overall generally I think this is a case where you should've thought smaller. By my count I saw the map names go up to "map 19", and I think that should've been the level count of the entire game, and even then you could've done with maybe half that and just focus more on the progression and having a defined ending. Maybe it's really easy to make lots of levels in RPGMaker, I'm not sure, but I know I've always found level design to be the most difficult part of game dev.
And frankly I don't know that I found this to be a "so bad its good" experience. It was tedious more than "bad," but the tediousness also held it back from being entertaining.
But back to the positives, I think there is more you could explore with randomized rooms, but I agree with the other comment it may be better for more of a roguelike experience. Or perhaps just have fewer, smaller rooms per layer.
I also liked talking to the various characters in town, with the buildup to the dungeon. Again I think the town level and buildings should be more compact, but it's more content dense than the dungeon which is good.
I think this is a decent start, and I like that you went a bit experimental with it instead of just a totally straightforward RPGMaker game. Good work!