When you're fed up with this game and just want to finish out the medals ...
Use Chrome browser and the highest resolution monitor you can, and crank up your monitor resolution as much as it'll go. Drag your browser window to the very top (you can actually go above the top but how to do so differs depending on your OS). Scroll the game so all that's visible at the top is the very tiny bottom portion of the "Play" button. Click "Play" then quickly click and drag the demon as far down as you can, way below the browser window.
You should pass the first 4 or so pipes easily but might die after that. If you died before that you weren't quick enough in the dragging. If you died after that you didn't drag the demon far enough down so he's below even the off-screen pipes. This is why you want the best resolution monitor and set the settings to the highest resolution, and pull the browser window as high as it'll go, and pull the game within the browser as high as it'll go and etc... Your monitor resolution and capabilities will be the limiting factor here as to how far down you can pull him.
Then just wait it out. Enjoy your medals. High score becomes a factor of waiting it out longer than anyone else did. I would say you get approximately 100 pipes passed per about every 3 minutes give or take so factor that in as to how long you'll need to wait.