Played the new build - and it is pretty darn good lol. Some pacing issues, and other bugs to be fixed, but you have clearly implemented a lot of fun items and skills/ideas that I can definitely make for a hundred hours of play.
I would look at your competition on multiple angles and learn from them how a gameplay loop should feel, how to set your pacing,
Rogue Lites - (Binding of Isaac, Slay the Spire, Hades)
Move and Shooters - Gungeon, Killing Floor, Borderlands,
Platformers - Megaman, Barotrauma, Starbound, Terraria
Indie Spectacle - Starburster (another indie game I'm looking forward too)
I'm working on making a video and a documenting my QA notes and such. I'll hit you up with it later in a DM :P