As state in the metadata, description and it always appears as notification in game to indicate, yes it is there is button to defuse the bomb on both side of the screen appear when the bomb is triggered.
Since this is solo development, I apologize that I couldnt able to develop the whole production grade (like upgrade feature) within a few days so this proof of concept and MVP is about the finished core game mechanics, base sfx and bug fixes.
However, hope you having fun with my game.