Okay, so I have done a little more and made some suggested changes. I will post a link.
It is only one little area. The transitions go nowhere yet, but would like to have it so the player can choose which area to start out at. Each area will require a key to open, and you get a key from completing an area, and can use it to go to which ever one next. The first area will require no key, and will be an easy place just to try out different things, like a tutorial. Not that I think that such a basic little game needs one.
Anyway, have a run around If you'd like. I got bored in the first few minutes.