Day Six In Progress
I've had quite a successful morning of programming, the game is now playable as a game and everything apparently works!
Consequently I've uploaded the current version so if people could download it and try it out that would be marvellous. Get it here. It only requires Python and PyGame.
The biggest missing element is the instructions, which I guess will make playing the game quite hard - but click some buttons and see what happens.
If you manage to crash the game please post the traceback message and say what you did!
Next job - write the instructions, then create a whole pile more levels.