To run the game just open index.html file in your browser.
Move player by [up, down, left, right] arrow keys.
Do not bump into enemies, because player will die.
Collect stars; when you'll get enough of them, you'll have to get the key. When you got the key, run to exit!
To start a new game, just click 'New game' button.
So, that's all, enjoy :)