Every piece of the Handuino is open-source and easily accessible. First, the designs (in Autodesk's ipt format) and code (in Arduino's ino format for both receiver and transmitter sample code) are available by download from my website, Kayrus.com (ZIP download: http://www.kayrus.com/legos/diy_rc_zip). For the LCD screen, the Arduino code uses two libraries from Adafruit as shown by the following:
These libraries are available for download from Adafruit's website (specifically, the tutorial for that particular LCD screen, https://learn.adafruit.com/2-2-tft-display/downloads) and their GitHub (https://github.com/adafruit/Adafruit-HX8340B).
I'd like to thank and acknowledge Adafruit for their thorough tutorials, example code, and libraries without which this project would have been much more difficult. I also need to thank Mr. Charles Dela Cuesta, my Robotics teacher at Thomas Jefferson High School for Science and Technology for providing the resources and time for me to begin my work on the Handuino (it began as a school assignment and has since grown from there).
Please comment if there are questions regarding any of the above. All of my work on this project (i.e. the information disclosed on all portions of the Projects page for this project) is released under the MIT license.