For those of you who may not know, button - mashing is simply pressing random keys hoping for the best results. (engagedfamilygaming.com)
The presets are also pretty nice with one of my favorites being a mode where keys light up as you press them and then fade out, letting you leave a trail of color across the board as you type, but you could also choose for a breathing effect where the light slowly fade in and out, or perhaps you could even go for the starry night effect by having random keys light up. (wolfsgamingblog.com)
The entire game universe is generated procedurally and can be altered with a number of settings, be given a completely random key or generated based on a key entered manually. (kickstarter.com)