The pachinko pins have a little bit of random drift when the game loads, so you might have gotten a lucky board and a lucky bounce :)
Thanks for taking the time to play and make a nice comment! I spent a lot of time on the audio. There's a background hum, the music track changes between 3 versions based on how many credits you have, and there are I think 12 different sounds that play based on either action on the board or different jackpot levels.