Firefly
Mouse
Mr. Sparks (aka Invisible)
Purple Snake
Seally (revised)
Seally
Puffball!
Little Chicken
Android App is here — draw wiggly pixel art free for a limited time.
Android App → 
Scan to download on Android
Point your camera at the code to open Android
Or open Android directly → iOS App: Apple Pencil + iPad canvas, wiggly pixels, one-tap GIF export.