As I don't wish to create a post for every feature idea I had, I will list them here.

• LED: 
  • Can be placed anywhere.
  • 1 pin variant: can either be on or off.
  • 3 pin variant: can either be off, red, green, blue, yellow, cyan, magenta, or white.
  • 3 BUS variant: can be any color from 000 to FFF. See about BUS below.
  • LEDs appear on chips, similar to LCD displays.
• 4 Wire BUS:
  • BUSes have their own pins. Normal pins can be turned into BUS pins by right clicking, similar to wire colors.
  • BUS pins may either have four test buttons, or a text box for writing down numbers.
  • Makes 8 and 16-bit ALUs much easier to produce.
  • Possible 8 Wire BUS variant to allow for 32 and 64-bit ALUs.
• Switch: 
  • Can be placed anywhere.
  • Similar to a test button. Click to toggle, outputs a signal.
  • Appears on your 4 bit register, or any other chip it's placed in.
• Button:
  • Can be placed anywhere.
  • Similar to a test button, except it only emits a signal for a second after being clicked, requiring the player to invent a latch mechanism for certain use cases.
  • Appears on any chip it's placed in.
• Additional LCD Displays:
  • Dot Matrix Display:
    • A grid of dots that can individually be powered on or off.
    • Requires many input pins, usually more than 16. Basically requires BUSes.
  • 16 Segment Display:
    • A more advanced display that can show additional symbols.
    • Requires 16 input pins. Using BUSes would make things easier.

This is very cool! I love these feature requests

Thanks for sharing your ideas, I definitely want to add all of these :)

Maybe in the meantime we could get CTRL + Z Implementation