Not complete, just a test. You can change the buoyancy level, oxy time and sprite. Boost with space. Different boost versions are coming! Im trying to code physics and damage mechanics, but before that, you can just attack the dummy.
Thanks for @NerdyAuk for background and water sprite. How to test your bird:Upload your sprite to sprite where pelican exist. Change the health and oxygen variables. Set your buoyancy level and done!