Simple AI playing simple game

Created for Pimoroni's Scroll pHAT + Raspberry Pi Zero

Gameplay: https://youtu.be/6IYYVfa6qmk

Contains two main algorithms;

Field.tunnel_gen() - Generates survivable tunnels for the AI to fly through.

AI.next_move() - Calculates the next move (up or down) based on what the next tunnel layer looks like.