I make pictures and games. Currently developing a freeware platformer roguelike called Red Rogue in my spare time. I also work for Nitrome Ltd.
one area is in full colour, that's all you're gettin
When finished, yes. There will be downloads for as many OS' as I can support.
If you find game.swf at the url you can get the flash file and run it with a desktop Flash Player. This will give you full keyboard access in fullscreen mode (contrary to the warning).