New Enemies, Bug Fixes

Bouncy Ball - bounces around the stage endlessly until the snail eats
it.
S-Cargo - when the player enters a region underneath, the s-cargo is
dropped. When it hits an object underneath, it explodes into salt
pellets.
s-cargo glitch

s-cargo had issues where it wasn't clearing it from the enemylist
it now clears, but if player uses ice to kill it, it gets cleared twice.
s-Cargo fixed

death via ice projectile was cause of problem. Should be all fixed now