This is one of the most unique game mechanics I've seen recently.
I miss the old days of fun desktop toys / mini games where it's just dumb fun for a short amount of time, like the old "office games" time wasters or classic apps like desktop destroyer.
I'm quite sad that not a lot of people seem to notice this gem since it's a desktop app. I guess for the web version, you can make a faux desktop and have it run full screen.