When I saw your comment, I was like... this prototype needs refinement. So, I worked on it a bit more and uploaded... a more presentable prototype.
I still remember that RPGMaker game jam. It was just a nameless game jam, yet you put your best effort on it. When I analyse the combat mechanics of that game, It seems that you have a decent mastery over RPGMaker, as if that boss rush game wasn't your first rodeo. Can I ask how much experience you have in your belt when you started that project?
Also, I could no longer run my RPGMaker MV after the latest windows update. When I launch RPGMaker, it just crashes. Thus, I could no longer enter another RPGMaker gamejam with or against you. However, I could make an RPGMaker-like game in Godot. So, in the unlikely scenario that you want to use Godot to participate in another game jam, let me know. We could work on something cool.
Finally, I want to express how flattered I am for you to take the time to write a detailed review of that silly RPGMaker game I made.