Very interesting hunt. Love the animation it shows on the screen along with different sounds.

Pros:
Awesome animation with sounds
Might be a very good tool to let kids engage with
Simple and easy to use. No pre-set up needed
Almost any device with screen, keyboard and internet access can use.

Cons:
Maybe a bit difficult to use on Ipad, Iphone or any keyboardless device.

It is a very cool web app to be honest. Thanks for sharing!