So far, so good.
Some things I've noticed/thought of:
The action button doesn't work while holding another key down, so you might want to think about letting it work like that. Just to keep it flowing. It's no big deal lol
Will you be changing the buttons in the future? I don't really see a lot of using the escape key, because it might do something else you don't really want it to.
Indoors, the art would be fine, but when you have big blocks of green for grass, it's a little hard to tell you're moving. I know it's not you're final product, but make sure there's a little variety when traveling long distances lol.
Plenty of songs for you to use on the audio portal =D
Good luck! Keep it up. =)