Press f4 to toggle full screen on and off. You get 3 elixers when interacting with the statue. Use WASD to move. Left click to use left handed weapons. Right click to use right handed weapons. Level up Stats by going to the menu. Go to skills and select upgrade. Then choose an upgrade.
Make sure to click inside the game before hitting space or else it will move the window down to the comments. If this doesn't help then just press enter to interact with things.
Let me know what you liked/disliked. (Don't mention that the game should have a potion counter. It does have one but the browser version doesn't show it for some reason)