That cool little “Coder for Raspberry Pi” project from Google which I linked to earlier doesn’t just run on Raspberry Pi. You can run it on any old Linux PC (Mac works too, but the instructions are slightly different).
I set it up in less than 2 minutes using these commands (note that I’m running Debian Sid):
sudo useradd -M pi
sudo apt-get install redis-server
git clone https://github.com/googlecreativelab/coder.git
Node.js is also a requirement, so if you don’t have that, you’ll need to install that at step 2 as well.
Once everything is up and running, point your browser at https://localhost:8081/. You’ll need to specify a password the first time you run Coder, after which you’ll be able to try the environment out. It’s pretty neat, and the sample clone of Asteroids is quite addictive!