Hi,
not sure if you're still reading this, but bought your game as soon as I saw that it's out. It's really fun. The multiple stages before the boss allow for more complex and therefore more fun builds and melee and ranged seem equally viable.
Besides maybe some minor inconveniences there really isn't anything that'd need further improvement in my opinion.
In case you want to take the extra steps tho, the the only things that come to mind would be:
1. One time I've seen one of the bigger variant of the hammer guys be stuck in one of the smaller rooms with these columns/walls in them. Stuck in a sense where he could only move in one part of the room, but couldn't access the other parts, because he couldn't pass the columns/walls.
2. Maybe remove collision from already opened chests, so players don't get stuck on them (might just be a me issue tho).
3. And I've seen the game has the "hard" tag, but the game seems to be quite a bit easier compared to the demos. Not sure if that is intend or just a byproduct of the changes you made.
BUT there is one thing that I feel like needs much improvement and that's advertisment! The game does deserve some attention. I don't know if you are aware of it, but advertisment is a very very important aspect for a games success. I'm not telling you to put money into an ad campain or something, but for example just a few shorts and tiktoks could already go a long way. Granted there is no garantee for anything, but I think it's worth a try.
Also maybe add a note on here, that the full version is available on steam.
Hope you have a good day and I'm definitely looking forward to any potential future games.