This game is a solid base, but it seems lacking in a few major ways. Adding some sort of audio to the game would have been nice, as the tension that this game seeks to provide is very difficult to get with no sound effects or music. Additionally, adding some sort of visual response to each input could make the game feel more fun, such as if a wire became cut in two after each input. One final thing that could be good and increase tension is simply making the codes a little bit longer and/or reducing the amount of time you had, as the player would be more likely to see that there is very little time left and be more stressed. That being said, this is a neat project and a fairly unique take on the story to set up diffusing the bombs, good job!