I remember playing hopscotch with 8 boxes (no rounded top.) We used key chains to throw into each box but not to touch any of the lines or your turn is over. After you successfully hop thru all 8 boxes you continued back to the 1st box.Once that is completed we now played the 2nd half of the game called “potsy” which entailed hopping on 1 foot only! Also with the same rules of not steping on the lines.
That’s how we played hopscotch in Bay Ridge Brooklyn in the 60’s.