Do you think you'd be willing to use GameMaker? It uses its own programming language (GML), but its not too different from C# or C++. Though, I've already done a good bit of the code for my game so far, so you'd have to be able to build off of it.
I've never used GameMaker, so I'd have to learn quickly on the go. I've also never programmed with GML, but I know it's one of those scripting languages designed to make coding easier. At first, it might take me a bit longer to get things done until I get comfortable with the engine's design and the language