It's a solid and super-super-short dollar platformer. Nothing that'll blow your socks off, and it really doesn't need to be; if you like semi-PS1 aesthetics and games you can speedrun, you've found a game here. No outstanding gimmicks or even any offensive attacks, just a breezy run-and-jump to whittle down to a science till you get tired.
I take issue with the horror elements for sure. Nothing actually scary here, besides a cool design on the main villain; everything that is "horror" is about as much of a jumpscare as the Mario 64 piano, at all times. Even then, things like Starry Sky having evil stars in the background and a garish red tint feels more obnoxious than anything. As if these elements were tacked on for the "haunted PS1" theme. As if it's not enough to be a cute and cuddly 3D platformer to stand out. Also, this game is way too reliant on platforms that move in an arc for way too long, for something that you're encouraged to speedrun.
I recommend Toree 3D for sure, but it's begging to be built upon.