1) Hold the control key for about half a minute in the level designing mode(not the test course mode).If nothing happens,press the right arrow key.Ridiculous things will happen in the background.
EDIT:
2)(This works in the latest SM63 version,other versions I`m not so sure if it works)
Create a switch (lets call it Switch 1) and another switch (Switch 2).
Switch 1 must last enough time for you to activate Switch 2.
Set switch 2 to 0 seconds.
Add some Switch-Controlled blocks.Activate Switch 1.You should see the blocks.
Activate Switch 2.
What happens to the switch-controlled blocks: show


