This mezuzah is 6cm. Amazing ksav for that size, I think we can all agree.
But look at chof pshutah in the word "baderech" at the end of the 4th line. He does a number of the chof pshutos in such a manner (too long across the top, and a shailo of looking like a large reish).
My question for Reb Moshe (or anyone else) is two fold:
1) Most probably we do a shaylas tinok here, since the regel is still marginally longer. Do you agree?
2) Assuming you agree, do I cover the other letters or not (much greater chance of a child saying reish if I cover)?