I realized I didn't include any puzzle/note information in the game guide, so I've gone and updated that, but if you want to avoid spoilers, I'll just throw a little hint here. The 12th and 14th notes are found in "dad's office". Dad's office, however, cannot be entered again after you've left.
You don't need all the notes to enter the tunnel, however you can't enter the tunnel until the end of the game. If it won't let you enter the tunnel, it means you aren't there yet. :)
Originally the hunt minigame was supposed to have a 50-50 chance of killing you, but it seemed that whenever I tested it, the random chance never worked properly and always let me live (I never died in the testing phase, not once, I had to change the programming to force it to send me down the route to be killed). So I tried to change it but it seems I ended up making the chance to die more of a 70-30 hahaha. I haven't decided if I want to change it because it does make sense for the chance to be killed in a town infested with monsters to be higher than normal.
I appreciate you took the time to play the game! :D
