God almighty man, who the hell puts in high res animations in RPGM?! It's unplayable. Renpy is the right engine for this game. Or if you really want to stay on RPGM then either make it static images only or use simple low size animations so the app can actually process those in less than TEN FUCKING MINUTES. That or try to find a way to optimize because holy hell, the most unoptimized shitty pre-alpha unreal 5 game works better than this. Did you even play your own game? It took me 25 minutes to reach that screenshot.
That aside, I really don't understand why this is made in RPGM in the first place. The style of the game, the design of features like moving between locations, everything points to a Renpy VN with a few RPG features. EVERYTHING. So why RPGM? Way I see it, it's like trying to make a sidescroller in Unreal 5. You can, sure, but that's not what the engine is built for, and the result will likely be, short of a miracle, buggy and oversized. Maybe I'm missing a few things, maybe I don't know about stuff that you want to add further down the line that's easier to do in RPGM, but as the game is right now, RPGM doesn't seem the engine for it. Simplify the art or change engine, that's my advice.