My high score was 200 and I played for over 300 seconds, to give you an idea of how my game play was. Here are some things I think might make the game more fun.
1. Just like in the classic snake game, make each food item grow the snake more than it currently does.
2. Make the collection range slightly bigger for food items.
3. Give some sort of warning when a mole hole is about to appear. Make make the mole object slowly fade in for 2 seconds before becoming a hazard. Two seconds feels like sufficient time to get out of the way but short enough to keep you on your toes.
4. Shrink the playing area by about 50% to constrict the player's movements more and make the player worry about running into themselves.