I do think it could be highlighted better that other languages are supported. I almost didn't sign up because I thought it was Ruby only after the tutorial. It

I do think it could be highlighted better that other languages are supported. I almost didn't sign up because I thought it was Ruby only after the tutorial. It would obviously be ideal to have a demo for each language you support, but even if you simply highlight a bit clearer which languages you support right in the top part of the page rather than as a bullet point further down, that should really help your conversion rate.