Adventr

Here's what I want to do:

- customer scans QR code that takes them my Adventr

- Adventr is embedded on a Wordpress theme that fills their screen with ideally a 9x16 scaled version of my Adventr. No navigation, no other branding.

Any suggestions on a Wordpress theme? Or other vehicle (not wedded to Wordpress, just what I'm most familiar with)?

Thanks!