Some people say they find my old Dot Dot Dot game relaxing http://lalo.li/ddd/
I'd guess a necessary enhancement to make it more of a game would be to have it pop the dot when it hits so you can never rest easy.
I don't want to be disrespectful to OP but my PC is too old to run their game.
Congrats on landing a new job. What're you doing now?
But yeah, it works only with a mouse/tablet interface. Wondering whether 1to1 mapping of the (input device)TOscreen makes a difference. Where dragging, multiple repositioning of the cursor, targeting the position brakes the fun.
hypothesis: it is fun when you can match the movement of the ball with your input device. (speed, resolution, smoothnes)