Thank you so much for playing my game! The image error was actually because some files had a capital .PNG extension instead of lowercase .png. It's something that never happened to me with Unity, so it caught me off guard.
I hope I've fixed all the bugs now. Also, inside the first area (the train car), if you walk up to the bottom-right corner, that tile will grant you all the necessary items. Pressing Enter there will also give you the option to skip 3 days ahead, so you can pick up roughly where you left off.
On another note, I apologize for the few sentences that slipped through in Spanish. Due to a lack of time, I wasn't able to test it thoroughly enough. While my initial plan was to release a patch for both languages and fix the remaining bugs, I ended up putting it on the back burner due to its practically nonexistent reception—something that had never happened to me with any of my other projects.