Your snake game doesn't even have food for the snake to eat? The snake just grows without eating, until the head collides with the tail somewhere? Pssh, amateur hour...
My first thought was to make random sectors of the first hard drive the "food"... For better or for worse, this stuff really brings me back to my teens. Nice job!
Tron is a great game for fitting into a very small space. Back in high school I spent a lot of time optimizing Tron on the TI-82 to fit in as few bytes as possible. It looks like I got it down to 152 bytes: (only about 80 bytes of actual Z80 assembly code)
No it isn't.
In TRON you leave a trail behind. In Snake, you grow as you eat and drag your body along the path you crawled.
TRON's trail is static, Snakes body is dynamic.
And that difference only exists to support the single player vs multiplayer dynamic. If Snake left a Tron tail then it would be a very short, unfun experience. If Tron didn't leave a permanent trail then matches would last too long.