Sorry but when I finish the fight with strang demon and last boss in Challenging floor، my game broke and stop and I must restart the game. Please fix this problem in the next update if it possible. 

Did you get an error message or something? Did the game break at the start of the fight or at the end?

At the end when I win and I dont get the error message. When I dont do anything after winning the screen becomes black، the music of the game is playing but screen becomes black and I cant do anything. 

And sorry I didn't tell you earlier. I play android version