If you are attempting to use Cheat Engine for Demonophobia, you are likely encountering compatibility issues. Because Demonophobia is an older RPG Maker 2000/2003 game (or a custom engine depending on the version), standard "4-byte" searches often fail.
Here is a technical methodology for advanced users: Demonophobia cheat engine
There is a long-standing debate in the Demonophobia fandom: Is cheating ruining the game? If you are attempting to use Cheat Engine
A reasonable rule: Complete the game legitimately once. Then, on subsequent playthroughs, use Cheat Engine to explore alternate endings or dialogue you missed. A reasonable rule: Complete the game legitimately once
Do not scan for "Exact Value." Use "Increased value" or "Decreased value" scans.