Seven skins just hit the Store. For Halloween: Pumpkin, Ghost (with the Haunted Bedsheet and the Tombstone Core) and Frankenstein. For anyone who doesn't need a holiday to make questionable choices: Capybara, Panda, Frog and Penguin.
Each skin has four parts (body, eyes, mouth and core), sold separately or as a cheaper combo. Want to try before you buy? The TRY IT button on the skins screen dresses your amoeba for the next match in exchange for an ad.
Skins don't change how strong your amoeba is. You'll just get eaten in style.