Hippos
Each hippo is a single div! I used a massive amount of carefully placed box-shadows on pseudo-elements to "draw" the hippos.
The ball animation uses Velocity.js for super-smooth motion
Underwater Sub Adventure
This needs to be viewed on an iPad or other device that allows access to the device-motion API. Steering is done by tilting.
Walking Animation
Draw Your Own Game
Draw your own character! You can also draw other elements of the game, and then play using what you've drawn.