Working Mario Coin Block

I have created a Working Super Mario Coin Block.

When struck, the coins that are inserted are launched out of a hole in the top of the block. This is done by using a stepper motor to pull back a launcher held tight by a rubber-band. Once the last tooth in the rail passes the last tooth of the gear head, the rail is released and the coin is launched. The model is designed to launch US $1 gold coins. Included is a Mario coin model that matches the size and can be used in place of a $1 coin. The cube measures 145mm cubed. Check this Video to see it in action!

Print Settings:

Layer height: 0.2mm
Speed: 50 mm/s 
Infill: 20%
Supports: No

Here are some super cringe videos of the block and me building it. 

Code base:

https://github.com/Jonnywayway/Mario-Coin-Block

Parts List:

Stepper Motor
Arduino Nano
Vibration Sensor
Slide Switch
9V Connector

2mm and 1.5mm machine screws

Thanks!