An early version. This has a slightly higher key than the final version, is missing some elements, and doesn't cut off at the end.
According to the development discord and some DMs, the halloween theme is supposed to have at the very least poison water replacing lava, and a pumpkin that contains candy within for a goal. No other info is present about this theme other than the music. Before September 8th, the goal was going to be just a plain bucket of candy.
An earlier version, which is faster, shorter, and has an even higher key
Pumpkin goal, explodes once reached to reveal a bunch of candy.
The halloween music in the editor.
The halloween music under water.
The halloween music in game.