since your working alone why don't you try to get some help from a coder or something(I've never made a game so I don't know what you need)
Viewing post in ULTRAKILL PRELUDE WEB PORT comments
Eh, this is meant to be a port, not a mod. I don't intend to add new content for anything I port unless I am the creator of said game. Otherwise, I am keeping it stock. I know it would be cool, but I don't want to make major modifications to any of my ports unless it fixes an issue that plagues said port.