Read the main description of this project. It tells you everything about this project so far.
This update is just to let you know that this game is my top priority at the moment and so far, it's been very successful. I think you'll like the level / world editor, it's very flexible. I'll release a downloadable version once I've actually got a playable level for you to test the levels you make. At the moment it's just a stick figure running about a map with the objects you've placed.