I followed along with @rabidgremlin 's excellent tutorial to make a Tron clone. The tutorial was for a two-player version, so I thought it would be a cool challenge to make it into a single player-only game, hence the "Lonely" in the title.
One other addition is the ability to select the arena size before starting. Smaller arenas are generally harder, as the AI is tougher to outlast given the smaller area.
Instructions
You are the blue line.
The CPU is the orange line.
Move around the arena without bumping into anything, and outlast the CPU to win.
Menu Controls
U/D to move between menu options
L/R to select arena size
Z to start
In-game Controls
U/D/L/R to steer your bike
Z to restart after the game ends
X to return to the menu after the game ends
Special thanks again to @rabidgremlin for taking the time to make the tutorial