I got to rook. I liked the concept! My main strategy for staying alive was just to look up to see where the pieces spawned. I liked the different effects for each die number, but I think it would have been more interesting if you'd let the number the die rolled on determine the effect and had the ability to either jump or interact with the dice in some way. I think this idea has potential by introducing more types of dice (d4s, d6s, etc). If you wanted to keep your difficulty progression concept where higher numbers = more danger, you could scale it so that earlier levels use lower-numbered dice and as you get further in the game, higher-numbered dice are introduced.