This reminds me of 2000s era fangames. I mean that in the most positive way possible.
There is an understandable roughness to the whole thing because, as you said, its your first project like this and its a platformer made in rpg maker. But I think despite that it shows an ingenuity and passion throughout.
The fact there is an earnest foodfight fangame that body slams you back to the title and has bump combat is exactly the sort of stuff I love fangames for. Very excited to see what you do next.