That is a bug caused by how the game saved once an ending was triggered. There are steps in the v1.3 dev log to help fix your issue.
Viewing post in Zenn's Quest for Candy & Car comments
Thank you. I was wondering if there was a way to edit the candy values manually but I'm not savvy enough myself to figure it out. I also do think that the options on-screen once you get to the repo building are unclear. I accidentally ended the game because I did not know what to press/what option was selected. Luckily, pressing "Continue" allows you to avoid this, but it was still worrying at the time, as I thought I had lost an hour or two of progress.
Edit: It would seem that I have no idea how to load a .tres file even though I installed the Godot engine.