I love this game. First of all it inspired original thought in me. I had a eureka moment and was able to shift thinking about it as a process to a hypothetical maze. This was immensely helpful and allowed me to complete each level with no errors. That being said, it was pretty easy. The simple gameplay and method are great exercise for the brain with a solution always close at hand. The music had to be muted, immediately. I have played games where you couldn't mute the music and am eternally thankful in this instance that I could. I don't know if it was your intention to have every puzzle solvable with zero moves left, but if it was level nineteen misses the mark. All in all, a fun fifteen minute distraction.