Ok, this one actually creeped me out. Really creeped me out.
The buildup of tension, the way it goes from environmental clues that something is not quite right to survival horror as the convincingly 90s music, crafted to lull you into a false sense of security, just stops dead in its tracks is brilliant. Very well done. Achieved without jumpscares, too. She's just REALLY CREEPY to look at, but at no point you're just flashed with a jumpscare.
The presentation is on point for the gameboy, and this is doubtlessly aided by its being a gbstudio game. I especially liked that there was care to make everything look period-accurate. You're not browsing emails, you're reading diaries. The house isn't too modern, it's furnished like an older home. Our protagonist is dressed in a retro way. It really just feels like something that could've been made back then, and specifically for the Gameboy at that. Good eye for detail there, it greatly helps immerse the player.
All in all, a great, ambitious offering.