Hey not bad for ur first game.
Umm if I could suggest a few things though.
For starters make the snake a colour instead of transparent.
Mabye add some obstacles as u get farther into the game.
I dunno wht the text on the side is for, to take it out for a larger playing area.
Make a restart button instead of just clicking.
You should have a pretty good snake game.
Good luck, and congratz.