I'm really sorry, I want to give you more stars because you're clearly passionate. But this... this doesn't deserve anything more then a 1. I'm really sorry.
I've got to give credit where credit is due: the music is pretty cool. Very spooky atmosphere. And I'll admit, the gameplay was just fun enough that I finished the whole thing. But it wasn't THAT fun.
As far as platformers goes, movement is very unsatisfying. You slip and slide all over the place, jumping is weird, and then in the last level you control two characters and it's impossible. Also, as other people have said, the knockback is atrocious. The game as a whole feels so floaty, and whenever you hit an enemy you're sent flying back like you just got caught in a hurricane.
But the action platforming isn't even the worst part: it's the "dating sim", if you can even call it that. I'll admit it's a unique concept, and I probably would have liked it more if the two characters weren't the most obnoxious people I've ever read. I tried to get engaged, but come on, why does the demon girl HAVE to type like a middle-schooler? Because anime?
I actually decided to have the guy just stop responding to her altogether, and you know what happened? I actually started getting better scores! Suddenly my affection was at a 6 and I was getting an A for the date every level. By ignoring her! So what we've got here is a dating sim that isn't even functional, and which only serves the purpose of telling the story of the two most annoying characters ever written. Hooray.
I shouldn't rip too hard into you. You're clearly very passionate about making games, and this is better then most people will ever do. But I also think if you want to be a great game designer, you gotta graduate from making competent games to making good games. And while this game is pretty competent, it's far from good. Keep it up.