The concept is really unique, having to manually type down what the guy tells you to while simultaneously keeping track of what number you had previously typed before the new one.
It gets hard on the later levels, which I love because it manages to keep the game fun while simultaneously pretty difficult to deal with, the movement mechanic being needed to complete certain countdowns sometimes caused me to mess up as well, but I don't really mind.
The humor's quite funny as well, I liked how the developer did it here using the fact that the attacks are colored textboxes that can contain anything in them.