V1.4:

• after i got feedback from a user i put in more feedback for the player if he is out of air,
  •  i apply a small screenshake as soon as player is out of air.
• also feedback was to have the music on/off be reminded. done!
• also feedback was to have a particle effect when player jumps in or out of water -> put in a particle watersplash effect. Done!
• so i thought i put also in a watersplash particle effect for the boat too. Done!
• i finally fixed the annoying player falls from the boat or glitches with the moving boat bug. love that one
• little bit of colourgrading of the foreground, made it more blue not so dark anymore.
• put the gold coins a few layers in front to make them more visible, because the foreground can block the view. 
• I made the foreground just a tiny bit transparent to see the coins better, can`t make it too transparent or the visual hit is too big.
• added a item highlight shader to make the gold coins even slightly more visible
• added in a NES Shader/Black bars as Intro: https://godotshaders.com/shader/load-tiles-row-by-row/