Go build it and report back.
Discussion
You just said they all fail which ones have tried and failed?
you don't understand the complexity of features, not hard to tell you haven't done much programming
I’m not a programmer but I do not think combining something like cornychat.com with a simple multi player game like battleship would be that difficult. I could build a MVP for this as a webapp but it would have to be created as an iOS and Android app to compete with the existing battleship games on the app stores.