Add "Inspiration" section

[larister]

Add some ideas for people to try out to the README.md

[orangespaceman]

A few initial suggestions:

Environment

• seaweed
• coral
• seabed
• treasure chest (that opens on click?)
• shipwreck
• shimmering sunlight

Creatures

• fish, turtles, jellyfish, whales/dolphins, etc
• lurking shark?
• crab? (like the pavilion crab from the JavaScript Jungle)
• shoaling fish? (like the flocking birds from the JavaScript Jungle)