ibrobot.. wanna highlight to you that you stated :
1. Pick a number between 1 - 1,000
2. You can guess multiple numbers
IMO, I suggest you should change the "Pick a number between 1 - 1,000" > (Pick ANY NUMBERS from 1 - 1,000).
And cancelling the second statement (You can guess multiple numbers)
It should solve any misunderstanding.