Thanks for the feedback. Windows 8 with chrome 34.0.1847.137 is working fine here. Which script in particular is failing, is it when you press run?. Moaijs is rather large when downloaded and extracted, maybe there is a corrupt cache, try hard reloading (ctrl+f5).
Moaifiddle isn't dead, I am actively working on it (adding share button, and allowing custom files to be uploaded and multiple lua files per fiddle). I have been distracted by iOS build problems for moai, and bugs/limitations in ractivejs for moaifiddle. I only get about 1-1.5 hrs a day of free coding time to work on moai etc, so please bear with me.