They said it would be easy: "Simple" website/app for work

Question

I was trying not to do this, but I’m stumped and I could use help.
Work asked me to make an iPad interactive for the library.

Essentially it’s five screens- one home screen with four touch options and four sub pages with media (video and photos) and a back button to return you to the home screen.
It needs to run on two iPads connected to wifi.

The trouble I’ve had with writing this is the touch element- it’s like they’re asking me for something that is more than a website but less than an app, and I don’t know how to code that.
I worked up something with four buttons on TouchDevelop, but it looks janky and I can’t add the eternal media. I’ve been reading about HTML5 and Javascript, but I seem to be going in circles.
I’m stumped! It seems so simple and I’m getting nowhere. I've searched on stackoverflow using tags like iPad, touch, and media, but the responses are for specific bugs; I need help with the workflow.

Any advice would be greatly appreciated- this is my first non-spreadsheet assignment at work.