Figured out you had to click slither on to continue.
Found something else though, the race with the corn in it, at the bottom of the level, when you fail, you are placed inside the maze and when you exit it starts the race and you can't get back in. So when it put me back in after failing, I went to the end of the maze and was able to get out of the map and slither around the outside and explore, which I found interesting.