I created a text adventure game making language called Adventuron which is hosted in a browser.
This isn't just for the rPi, but posting here because it seems like a fun activity to perform parent and child, on the Pi.
The language has autocompletion, press control + space to get context sensitive help. Press the Play button to send the game to the gamplay window on the right.
Any feedback is welcome.
NOTE : The editor UI is not yet optimized for tablets/smartphones.