I was thinking about embedding some platform mini-games inside a top-down game made with RPG Maker. I am actually not doing any commercial projects but asked for it because I find this tool really good. For someone only wanting a mini-game and working on a commercial product - it would be reasonable to pay you.
As for changing the code - I have no problems working with html + js. As for the RPG Maker side - this is a bit of an experiment. I'll let you know if I had any luck integrating the two.