I wrote this little game during my A-level computing classes to see how much further I could take what I was learning and apply it to a real program, as such it is a little dodgy.
It is snake, and it does work. Even has a little level file format.
This is distributed with thanks to James Allen, who bravely designed the only level file on the TI-82 Snake implementation
This is only compatible with versions of Windows pre-Vista, but if you feel like giving it a go then please be my guest : )