OK @spongehammer, I think I've un-f>>>>d it! Let me know if you encounter anything else that's a little bit impossible
. I am planning on adding key change options at a later date - it's normally one of those logic setups that I dread so I put it off until everything else is done, but I'll probably do that over the next week if you don't like how I've set it up...
If you find that the game save logic doesn't work then you might have to clear cache and start again (!) but for now you can keyboard number-key shortcut to the various spawn positions if there's something you want to look at again.
Keyboard 0 to 6 - shortcut to reset position
NumPad 0 - clear browser cache