Hi
I'm a ui developer with 12 years of experience in various frontend technologies like Html5, Javascript, css, angular, bootstrap.
I've also developed a lot of canvas based interactive apps.
In fact, I've developed something very similar to your protoype, called as kids coloring book and kids connect the dots games.
I've also developed scratch card app.
All these apps are not only responsive, but also works perfectly well on touch screens.
Looking forward to working with you.