I checked the two games you mentioned, and it seems only the working one had their files crypted into the .exe, so it may be a matter of packaging.
But other than looking at different ways to compress my files, I don't know what else to do.
Well, at least it's not a common platform, and you're not catering to the Steam Deck audience, which I don't have so I can't help you there.Good luck with the game!
I will actually try to get it to work on the steam deck, since I have a friend with it and a fellow dev that managed to do it. C:
Woo! Yay for friends and stuff! Good luck!