I made it about halfway past Saturn before I gave up scrolling. Nice work. One comment: If you're using km for the distance units, you might as well stick with

I made it about halfway past Saturn before I gave up scrolling. Nice work. One comment: If you're using km for the distance units, you might as well stick with it (metric) for all the other examples like 75 mi/hr and 475 ft to be more consistent. Better yet, an option to switch the units between imperial and metric would be pretty cool.