What is happening???? – Love Story : Magical Princess 'dating & life sim' Review

I download this app because it looks fun to play but I don't know why this happened. When I clicked on the app. The screen is very weird. It has the what I assume the cover of the game turned smaller onto the left bottom side. It is not made into a full screen. I wish I could show what it looks like by inserting a picture in this review but it seems like it can't be put in here. I am not sure if it is just me, but I hope not. Please check if there is a bug. If the app developers of this app see this review please help. I really want to play this app but it is preventing me by not having full screen.
Review by Starlight Wish on Love Story : Magical Princess 'dating & life sim'.