Quite a weird bug, this is not supposed to happen. Blur only appears when a popup/menu is on, else it should be crystal clear (like in trailer and screenshots).
Please redownload the game (it was updated yesterday) and try again.
1. Does the issue happen only on android or on PC aswell ? if only on android - try installing other versions (x64, LowQ)
2. (if on android) What is the model of the phone and the android version ? (maybe this will help us figure the issue)