Selling a company is just sales. You have to network with the community you want to sell to. Go to events they go to. Scout your network to find someone who knows someone. Read the blogs the target community reads, post when you have something intelligent to say.
Next step isn't going to be a sale, it's going to be to develop a custom app for one of those target companies, hopefully one large enough to be a potential acquirer. If you are lucky they will start to talk in terms of "strategic relationship" as you become a trusted provider. They will want to see a track record of app development, to "prove" your technology, your team, and your understanding of the real product requirements for a game platform. This may even provide some cash flow while you look for an acquirer.
Beware, there are many many sales/mkting consultants of many types willing to take your money to aid this process. Those who can, do. Those who can't, consult.
Good luck.
(Credentials for the above comments: Sold two companies, on my third.)