main menu game

Hy yal i’m really a noob on UE4. Right now we want to develop a simple time attack game where the player just has to click on something on the screen or type a word on a sertain amount of time and if correct just go to the next level. My question is. Can we make the intire game with the user interface widget. The main game is a black screen with text a timer and maybe a flipbook animation on it. If this is all posible with the UI widget it would really help us alot. Thanks