I really liked the concept of the game. The first playthrough is very exciting, since you have no clue what you have to do and you are trying to read as fast as possible without being distracted by the fact that theres a bomb ticking and that it's going to explode.
For some reason, the next time I tried to disarm the bomb the light patterns didn't show. Maybe it was because i rushed straight to cutting the wires and doing the math problems? Also it would be nice to have a "back" button on to go to the previous page on the manual.
It's a really nice game. I loved the sound design in this, especially when the bomb goes off. I was a expecting a LOUD explosion. But instead, you decided to use the ringing sound. I liked that , I thought it was a more pleasant and elegant choice.