Here is a small list of devices which worked: iPhone 5s/6 (works with Safari on iOS 8+), Galaxy S4/S5, Nexus 5, Archos 50 Diamond. For Android devices, Firefox Nightly is recommended.
Tap the "Activate VR" button, rotate your device to landscape and check the devices settings in "VR Setup". When done, close this configuration screen, put your phone in a VR adapter (like this one) and enjoy ! :)
IMPORTANT: on iOS devices, tap anywhere on the screen before switching to VR mode (this will start the loading process in background).
Do you see that white point in the center of your sight ? Align it for a few seconds on the item you want to activate (a green "Start" button to launch a ride, etc).
Tap the "VR Setup" button on the bottom of the screen, and check if the "Screen size" is correct. Change it to match your device. You can also choose the VR headset you're using from here.
These projects are technical experimentations, and non-official tributes, solely for not for profit activity. It doesn't intend to infringe on copyrights belonging to THE WALT DISNEY COMPANY and/or any entities involved in the making or exploitation of the VISIONARIUM, SPACE MOUNTAIN or STAR TOURS rides.