I've already tried the existing png of this game but it didn't work.
game name：Idle Heroes
The sign seem ：DHGAMES
Using the IDA found the key：DHZAMES or 0123456789abcdef
but it didn't work.
Please help me. Thanks
Neither of those are the key, the GHZAMES is used after the decryption function as a secondary check for operations and 0123456789abcdef is used in a binary to hey utility class. That said though working with IDA isn't really my thing sadly and I don't debug mobile games.