Drugged out YouTube deleted my comment twice so I'll just type a TLDR here:
Thank you for playing my game, I'm glad you liked it!
The password you received after the good ending is for the locked Bonus.RAR file that can be found in the downloaded versions. It's now uploaded individually so you can download and unlock it.
I've also modified the bad ending so what happened doesn't happen again, cuz it used to rely on the player interacting with the (items) on the ground.