Would it be possible for CodeCombat to accept server-side parsers for languages like c#? I think it would be much easier to implement compared to an in-browser version. There’s an open source c# to javascript compiler (http://live.bridge.net/) that works pretty good. It compiles the c# code server-side and returns javascript.
It would be interesting to try, although it would require a lot of changes to the architecture. We may do something like that eventually if someone wants to take the lead on it. If we do it in-house we’ll probably just write our own client-side parser, since the eventual result will be a lot better when it can be instant client-side parsing.