Use the arrow keys to move. Click 'see inside' and look for the maroon colored blocks. Those are the secret blocks. The user tag has no relation to the user id block, I just did it to see what visitor you are. Also, it won't always mean you are that numbered person, as some people may visit more than once.
These 'secret blocks' were removed during beta of 2.0 and are colored red/maroon. Help yourself to them by going inside of Sprite 1 and dragging them into your backpack. I give credit to Aussieunicat and YankeesRule888 for the idea of secret blocks. These are the blocks that don't work: The for every I in __ block, The red block with 2 dashes The hide all sprites block The loud? block. These are the blocks that do work: The noop, incr counter, and clear counter The all at once (maybe) The while block The user id kinda works. It will change the variable, but it says undefined.