I can see why Sprunki Games can become surprisingly addictive, especially when experimenting with different sounds is so easy. I think that creative trial-and-error is also part of what makes simple games enjoyable. For people who spend a lot of time gaming on a computer, it can be interesting to work on keyboard accuracy outside of gaming too. I sometimes use checking your keyboard skills as a quick way to practice and become more comfortable with different keys. The combination of creativity and experimentation definitely makes this kind of game stand out.