Your comment below helped me and I was able to finish the game too.
Fun game! It was challenging enough for me, but not too challenging and not too frustrating. Maybe I would add more communication back to the player: indication when I failed to disarm the bomb, when I completed the level, etc. It was a little bit confusing without that.
It is really impressive, if that's actually your first game! I don't think that what I mentioned or interaction key bug really matters, it was fun and I liked it!