well,
this is not a question of originality. I'm guessing you're a Salad Fingers fan? Okay, I'm not going to tell you what you already know. Yes, this looks/sounds/seems a lot like Firth's work, but it's not an imitation. perhaps you can expand a bit upon this character and some plots? The sounds are reminiscent of SF, but that doesn't make you an imitator. Don't listen to everyone who automatically compares. If they hadn't already watched SF, they might call Firth an imitator. Just keep that in mind. Keep your chin up, your work is creepy and awesome.
ZeRo