Hi there Hackful!
Our London based startup is called Scirra, and we make Construct 2 which is an HTML5 game creation engine. It's designed primarily for people who don't know how to code however professionals are using it for a variety of uses such as rapid prototyping.
Here's our website: http://www.scirra.com
Here's a short video showing how it works: http://www.youtube.com/watch?v=5RlSmkSbleI
We've been operating now for around 8 months and it's all going rather well!
Happy to answer any questions people may have and we are always happy to receive feedback and criticisms about any aspect of our business.