This app is weird

So I just recently installed this app, and I was really excited about it. I went into it, incorporated my videos and everything. It was great, until I tapped on the little thing in the top right corner. It said,"Remove watermark" and stiff along those lines. I decided to ignore it, and I tried to tap on it agin to make it go away, but it didnt work. It turned out that if I tapped on that button, I couldnt get rid of it AND I couldnt edit my video anymore! Also, I didnt see any visible "play video" button or anything to see what Im doing! I just think you guys have a lot to work on.

Idontlikshrtnams about Video Collage - Collage Maker, v2.3