|Water?||Yes, but pretty useless|
The Birthday Cake is an Expert track taking place at a birthday cake in a small room. The Pink Cream from the cake acts as water (however it's useless because the amount of off-track water is too small to provide a meaningful place). You can't place towers on the fire of the candles, or outside the cake or the table.
The bloons come from the left side of the table, then split to 3 paths, moving on the different layers of the cake, then all climb down and exit to the right side of the table.