Thank you so much! I'm glad you liked it!
One of the endings is the last one, in which you need to have completed all other endings to obtain. There will be a hint on the guide after you reach the question section of the game if this condition is met.
Spoilers below for the other ending:
After you exhaust all questions, if you wait around 5 seconds, an additional conversation will play. After that conversation another option to the left of "Accept" will fade in in about 2 seconds.
Let me know if you have any more trouble and I'll double check the code, but everything seems to be working on my end.