Neither fun or frightening
First of all, the controls, they were bad, there's roughly half of a second of delay after you do a jump/land, I am assuming this was your attempt at momentum, but all it achieves is frustration in an aspect that largely dominates the game play, platforming. The music was like rape to the ears, it looped badly too, I could almost always tell when the loop started and ended, the sound effects were fine considering it was supposed to be retro. The game didn't do much in terms of horror, I was mostly confused, wondering what was going on. The puzzles and mechanics were easy and uninspired, most of the "challenge" came from fighting with the clumsy feeling controls. The controls were counter intuitive, you have to stop to defend yourself, yet some enemies can attack you while they move and the shield becomes mostly useless quickly. It just wasn't fun, it didn't draw me in, and the level design had no rhyme or reason at times, random shadows, the floors sometimes looked like the walls, random invisible walls that stopped my bullets, some switches being unusable in what I am going to call, rage form, for NO apparent reason. Plus you have a button that resets the level, is it to compensate for bugs I was lucky enough not to encounter?
The game doesn't achieve any fun factor or horror, it was just annoying and hard to control. Also what was the point in the NPC's? I felt like they either were there for no reason or to just pointlessly be killed. Then there was giant floating head guy with a stupid smile. Oh hey I found him, boss fight? Waaaaaaait, what? He died from touching 3 switches? What?
>:C