TI-Calculator Cake

This is a cake I made for an individual who is extremely passionate about mathematics. It is a spin-off of the TI graphing calculators, such as the TI-83, or whatever version we are on nowadays. This cake contains a great deal of inside jokes and mathematical terms. Speaking cake-wise, it is my signature chocolate cake with chocolate ganache and the "buttons" and "screen" piped in my signature vanilla buttercream. 
The top features the name of the calculator in red, the "TI-Teadale".
Underneath that is a purple screen featuring the words "MATH RULES!" in bold green piping. By the way, the ! on the screen is not an exclamation mark but rather a factorial sign.
The remainder of the cake features many blue and green buttons with red piping on them. There are basic number and operation buttons, some graphing buttons, and many unique buttons. Instead of a right and left arrow button, there is a "right" and "wrong" button. Instead of an up and down button, there is a "concave up" and a "concave down" button. Other buttons include "TEST", "QUIZ", "books on the floor", "ERROR", "mind reader", and "hawk eyes". If you don't understand these buttons it is probably due to the fact they are mostly mathematical terms or terms that pertain to the individual the cake was intended before. Even if you can't understand it, I'm sure you still appreciate the look of the cake and how it resembles a calculator.

MATH RULES BUT COOKING FUELS!!!