When you get a perfect song. You unlock a guitar called trip. It has the number '3' on it. The description says. "The Third and Final in a series of three. It's Supposed to be symbolic but I really cant see what it means."
What it means is that the guitar represents the Third game of SCGMD. Its saying that its the final game and that the series will not continue.
After playing this game a bit Ive figured out that
-Lightning is a support weapon it never works as a main offense.
-Spreading out your weapons works better than bunching them.
-You need 4 Fully Upgraded Magnets for you to not move and get all the coins (I Suggest only three).
-Missles are the best and 12 missles will only work if you spread them around.