Just experimenting.... ALT + 1 thru 20 gave me these...
☺ ☻ ♥ ♦ ♣ ♠ • ◘ ○ ◙ ♂ ♀ ♪ ♫ ☼ ► ◄ ↕ ‼ ¶

I've actually used ALT + 3 digit numbers for other characters and accented letters...
ALT 155 = ¢
ALT 156 = £
ALT 171 = ½
ALT 130 = é (also ALT 1410 = é)

This is fun!
but what do I know, computerphobic as I am. LOL

These "puzzles" are quite interesting...it took me a while to figure out what you all were doing. Might get brave and give a guess sometime.

Keep up the fun.

Mary