One must image the reviewer happy.
If I hadn't something better to do, I would probably quickly code an Autohotkey script to click the boulder for me and then go drink a coffee. There's probably a metaphor in there somewhere, about how automation allows us to escape the toil laid on us by capricious gods or something.
Some texture to the ground or sky would have been nice, to improve the feeling of moving over the ground. To have something interesting to see. Maybe one of those fun 2d-parralax effects. The speed upgrade should not push me down the mountain.