Pretty neat stuff! I felt like the whole creepypasta-chinese-bootleg-sonic.exe-whatever vibes you were going for were pulled off quite nicely: certainly had me tense for a long time playing this!
While the platforming gameplay is a bit simplistic and repetitive at its core to the point of testing my patience, the experience is well-paced, always introducing new special events or story segments whenever I feel my interest starting to wane, keeping me hooked to the end.
Speaking of platforming, I felt like the level design was always very fair: I was expecting to make a lot of leap-of-faiths and die unfairly, but the platforms were always close enough you could see them at the edge of the screen or react in time if you couldn't. You could argue that maybe it's almost too fair to the point of not feeling like an authentic bootleg, haha.
The game was creepy and tense, but I appreciate that you never did any jumpscare earrape nonsense: that would've made me shut the game off pronto. Thanks for not stooping to that level.
Now I've given a lot of praise to the game, but if I were to point out some issues, it'd be that I felt a bit unsatisfied with the story. The ending might felt meh and kinda confusing (I picked Yes and he still calls me a traitor as if I picked No?) and also the story goes from supernatural to actually just being a straightforward game, if that makes any sense. Like, Akai starts out feeling like some sort of glitchy ghost that's inhabiting a game he doesn't belong in and speaking to me, to just being an intended character in a game that has cutscenes constructed for him and is speaking to Sonic, not me. The village filled with NPCs as well just kinda killed all the tension. I dunno if I'm explaining it right: hopefully you get the idea. Maybe it's the intention, I dunno, I'm a newbie to this creepypasta stuff.