In *Primes*, your task is to sort incoming balls marked with either 7 or 9 into the correct containers. Each bowl is designated for a specific category: one holds prime-numbered balls, while the other holds non-prime numbers. However, these designations are not fixed—they switch whenever you click, hold, and release the mouse. Stay alert as the targets swap, and guide every ball to its appropriate home. The challenge lies in reacting quickly to the changing rules while keeping the flow moving. Enjoy the fast-paced sorting fun!