Improve the simulator

[davepagurek]

• Prevents retina displays from actually making this smooth. Need to keep it lo-fi!
• Lets you tap & drag like a joystick as an alternate form of control
• Adds an arrow in the corner that always tells you where the cat is so you can't lose it
• Adds a bus that only arrives when you leave the bus stop and always leaves when you try to go on the bus
• Adds a stranger you can talk to

[yucombinator]

+1 exciting!