Seenic.exe (A Sonic.exe Pre-alpha Demo?)

This isn't a normal Sonic.exe it's some bootleg copy called Seenic.exe game. I crashed Tail's plane crashed and jumped on Green hill zone it felt like a fever dream. I was shocked that it was infected with zombies and I saw a couple of weird Sonic clones. It felt I was a "generational" mix of sonic 1 and 4 level design. Where was also tetris and mario bits. There only has been Act 1, I couldn't find any more levels the level wasn't beatable. This must be a cancelled 3D Sonic rom hack or bootleg the creator tried to sell later for a quick buck... or is it? You can double dump, dash like cuphead, use the speed coil like speedy shoes, kill zombies and don't get jumpscared by Sonic.exe u guyz :0