Update: So I haven't been working on the level(because I'm lazy and have no access to Turbowarp on my Chromebook) but I promise it will come out relatively soon and I have a lot of ideas for the parts and deco I will build! I also might change the song, but it will come out this year so sit tight. I will try my best not to let u guys down :)
My ideas of theme/deco-wise thinking(All based on the song energy): First area; deep underwater (where angler fish are), low lighting, and a lot of big scary fish. Second area; A bit higher water level wise, more light, and the seafloor can almost be seen. Sunlight can be slightly visible and it's early morning; The Third part into a deep underwater cave, not much light and a lot of shiny rocks; The Fourth part is where you are on the very bottom sea floor but you can clearly see sunlight as it is roughly around 10 am, a lot of sea life like sharks and you go through a ship while a shark stalks and chases you then you burst out of the ship and the shark gets stuck and leaves you alone; The Fifth part is where some sealife are following you into a little cave then back up onto the sea floor where there is coral reefs and a lot of colorful fish; Part Six you are close to surfacing above the water and you can see humans and boats moving about; Part Seven you are above the water and are cruising along on boats and water waves; Part Eight it is starting to get late and you are on the beach shore; Part Nine you are taking a nice slow walk on the beach and the level ends with credits :)