The continue statement ignores the rest of the loop and returns back to the top for the next iteration.

In your example count is 0 at the beginning. Since it is not equal to 5, the if statement is not executed and count is printed in incremented by one. When count finally reaches 5 after 5 iterations or the loop, the if statement is executed. Since the only instruction is continue, the print and increment are never executed: the rest of the loop body is ignored. After this point count always has a value of 5 and this state continues indefinitely.

It does not break the loop, the loop is still running forever, doing nothing.

count = 0

while count < 15:
  if count == 5:
    continue

  # The following is ignored after count == 4
  print(count)
  count += 1

A couple of changes mean that only an R or r will roll. Any other character will quit

import random

while True:
    print('Your score so far is {}.'.format(myScore))
    print("Would you like to roll or quit?")
    ans = input("Roll...")
    if ans.lower() == 'r':
        R = np.random.randint(1, 8)
        print("You rolled a {}.".format(R))
        myScore = R + myScore
    else:
        print("Now I'll see if I can break your score...")
        break