Try Python, Ruby, Lua, Scheme, QBasic, Forth ...
amasad: After a 5 minute play my first impressions are 'awesome!'.  Some feedback:<p>I selected QBasic then changed my mind but couldn't immediately figure out how to get back to the list of the languages.  Clicking the logo of a website usually takes you back to the 'home page', which in this case I consider to be the list of languages.  You have buttons at the top right, with the lambda taking me back to the language chooser.  Maybe button labels, even tooltips would help.  But I would definitely make the logo the 'home' button.  Even refreshing the page didn't take me back.<p>Anyway, a minor complaint.  A super-cool effort.  I will now go play with it some more.