Adds new enemy for Gay Island

Yayyyy, hopefully my first error-free enemy! Hopefully.

Ducky was a really old design I had sitting in my folder for a while, so I tinkered with the Wasabi Blob code for him. Tried to make him go in time with the music, but...well, didn't go as I had hoped.

I figure until Gay Island has the difficulty spike in jumping puzzles, might as well flood the place with baddies.

I would like to extend thanks to the Beagle I'm dog-sitting. Her squeaky toy was base for the sfx. Good girl, Molly. Good doggie.