Hi guys, I'm Nia, the developer of the fangame Sonic Timeline Of Madness.
I do everything from writing code, designing bosses, designing levels and making cutscene for the game
This game does not have official music, so all music in the game is taken from SEGA and a few Sonic fangames
This is not an official Sonic game, the characters are owned by SEGA
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Link to the game:
https://sonicfangameshq.com/forums/showcase/sonic-timline-of-madness.1870/