Thanks for the feedback, and for giving the game a try.
I can only agree with you on this one. I plan to update the progression system of the game, making it "fun" throughout the whole game.
Running the game in the background should definitely be possible for the game. I will see if I can make that possible. I know some players have been able to have the game run in the background, but I guess it's depends on the browser and the browser's settings.