Good job. I made one similar to yours, but it was 536 bytes. Yours is way smaller. (mine uses labels and gotos.) I don't have a chord, however, and cannot connect. One major flaw, though. The number is stored as variable A. If the user types in A as a guess, it will be right. Don't let the cheaters get away with it! Here's a way to prevent them from cheating.
Input "YOUR GUESS?", Str1
What it does is prompt with input, so the user doesn't know that it is a string. Then it checks if the user tried to cheat with "A". If not, it stores the value of their number from String to the actual variable A. Then you can go check if the number was too high or low. However, it does have a flaw. If the user didn't input "A" or a number, it will cause an error. One way to fix this is to check if it is "A" or if it is a number. If not, give them a warning and start over. But all that takes up precious bytes. So decide: anti cheating or more bytes?
Good job! I hope you continue programming. Try adding different difficulties, or high scores.