Cash Rain is an Android game developed by Dorian Ja that challenges your money counting skills. The objective of the game is to count as many virtual dollar bills as possible within a given time limit. The longer you count, the more cash you earn.

The game has a simple interface with a green background and a stack of dollar bills on the screen. To play, you tap the screen to count each bill as it appears. The game keeps track of your score and the time remaining. There are no levels or difficulty settings, but the challenge comes from trying to count as many bills as possible within the time limit.

Cash Rain is a free game with no ads or in-app purchases. It's a fun way to test and improve your money counting skills, and the simple gameplay makes it accessible to players of all ages. However, it may not appeal to those looking for a more complex or strategic game.