Sandbox game

Hello I am looking for a professional freelancer who know we'll about sandbox game I have my building and environment design and the file is SPK file you can open it in scetchup software or online, but I want to make it sandbox game that I can open on my game maker, that I can play on it and go around it if this is what you can do message me now, if you don't know about this pls don't beg me for order. I need a professional, possibly from Pakistan.