You've done a incredible job. But there is some key differences that i don't know if you are aware of in relation with the original.
1. The original had "weight". Everytime you pick a treasure, the diver moves slowly. Everytime you go to the boat, it gives you a 3 times multiplier for each treasure you have, maxing out in 10 treasures inside your bag. It's a key element because it's a risk-reward mechanic that makes it more strategic.
2. You have forgotten 2 posible positions for the 2nd and 3rd tentacle.
But, great work.