I know javascript but i don't understand Unity's javascript!

The title says it. I learned javascript in codecademy.com I have succesfully managed to write some simple web apps and some mini-mini-games in javascript. But the real issue is, i can't seem to understand a s*** of Unity's javascript (unityscript i have read? correct me if wrong).I just wanted to try to make a game in unity using my javascript skills, but I can't seem to understand what all of those class and stuff in MonoDevelop! Is there any interactive tutorial online that can help with t$$anonymous$$s issue?