Complex sentence: For example, many early computer game designers used the CPU clock speed as a timer in the game, but the CPUs got newer and faster so the gameplay speed increased accordingly, making the game less usable over time.
Split into simpler sentences: For example, many early computer game designers used the CPU clock speed as a timer in the game. As CPUs got newer and faster, the gameplay speed would increase accordingly, thus making the software less usable over time.