What do you think about this concept (Visual design, UX-UI)?

App is almost done, it will be available on Google Play in late July, early August. Image icons are random, they are not done yet. I just want to show you some catchy UI features…do you like it?

" In this application there is a hidden menu, which the user needs to find a way to unlock. In the screenshot the user interface is shown since the feature is unlocked and the whole layout is responsive. The upper card is swipeable (it’s a similar behaviour like a Notification panel, you can swipe the upper card up and down.) And bottom cards are the fragments in the ViewPager."