Also, I hate to be picky but if you create a Sonic game and release it, even as a fan homage, be prepared for the factual fact that Sega will probably sue the pants off you for copyright issues.
I heard you’re hiring people to make a game you don’t know how to do, but you want to do.
You’re asking for people able to complete the code (without you learning how to do it), and then send the complete code to you.
That sounds like a job!
I’ve been learning game design in my free time for almost all my life, and I can make a basic functional platformer with Sonic-like physics for you to modify and create levels for it.
Send me your project specifications through private message and I’ll reply with a budget proposal.