Mask on the Arduino Esplora with TFT-screen

I realized that I have never created the classical game Snake, “Mask” in Swedish so two days ago I set out and created on with my girlfriend on the Arduino Esplora with a 1.8 TFT screen from Adafruit on it. 

Over the weekend, the game has grown into having some audio, an autoplay mode, cheat mode, selecting joystick or keys to play with etc. 
Unfortunately, we are running out of memory when the “Mask” reaches a length of 900 🙁 We can out course optimize it a bit more but it would be nice to be able to play “for ever”. 
The code is available at GitHub

In autoplay and cheat mode you can cross yourself.