Pressurized pop can alcohol stove

This is my first attempt in making a pop can (beverage can) alcohol stove. I did not run any burn test or boil test as this is my first experiment. I was expecting jet flames effect from the side holes but the flames looked weak. I think this is due to the size of the holes. I should make the holes smaller. Smaller holes will make the pressure in the stove higher during boiling of the alcohol thus making the vapor to spray out. It will probably make it more fuel efficient too.