Note to users having trouble launching the game
Snapdragon chipsets with Lollipop installed are not supported. It's a bug in the current Unreal Engine. Please use Kitkat 4.4.4 if you have a Snapdragon device. Exynos chipsets and Lollipop should be fine.
I had to downgrade my (Snapdragon) Note 4 back to 4.4.4. myself, in order to develop and test. Note: when you downgrade your Android version, don't forget to back-up all of your phone's data.
Unfortunately, this issue is out of my hands :(