It means you can suggest adding of a new puzzle piece to the game, and if it's accepted by our R&D team we will name that new piece after you!
You can simply write your suggestion in the comments, or leave it for later and we'll contact you to get the details of your idea.
Before you write your suggestion, please take a look at the already planned puzzle pieces:
PIR (motion sensor)
MakeyMakey (Keyboard like PC control)
Fork (implements the "if" conditional instruction)