Hi! I'm Diaz, from Indonesia. I have more than 7 years of experience with GameMaker specifically. I see all the other bidders offer nothing of this exact GameMaker skillset in particular, they just offer general non GMS specific game services to be made.
I work using GameMaker Studio 2, the latest IDE and runtime version, exactly as you want. Everything will be written to perfection, neat and clean codes, simple non-complicated logic, so this way anyone will be able able to pickup and continue working on your project after I'm finished with it.
Not only can I make your game project exactly as you want, but I also can offer you assitance through voice chat. I am always available for you to reach me and communicate with, everything will be transparent and I will fix things that you're unhappy with.
Also, if you want the independent server to be custom made as well, I write it in NodeJS. I can help you deploy it into a VPS server and have everything ready-to-go, so by the time we're finished, you will have a full online game under your control in your hands, completely deployed into the server. All including the GameMaker Studio 2 client project that you can always edit very easily anytime you want.
I would love to work on your project, looking forward to hear back from you!