It's for this exact reason that spin is not measured in MPH/KPH but in RPM. The earth is spinning at a PAINFULLY slow 0. 000696 rpm . Do this example, put an ant on the hour hand of a clock. He's already rotating at twice the speed of the earth. Does he feel it? No.
Now, take the ant and put him on a merry go round spinning at the rate of 2 revolutions per 24 hours. The ant is now rotating about 100 times faster on an MPH basis than he was on the clock because of the increased radius of the disk. Does he feel any different? Is he being blown off due to the increase in forces? Is he struggling to crawl along? No.
Now find a disk that is even larger, the size of an adventure park ride and do the same thing. Now he's spinning 4 or 5 times faster than on the merry go round on an RPM basis. Does he feel different? No. You can do this out to infinity of size and the ant will not feel any different... because he's still going painfully slow.
That's why spin is measured in RPM's and not MPH/KPH. The two examples you gave are rotating at TENS OF THOUSANDS of times more RPM's than the earth. If you honestly believe the earth is flat, why do you need to dramatize to make your point? Facts and logic would be enough.
I redid the math for you, using 6 feet and 20 feet as the estimated diameters of the rides.