It's not bad for your first, the drawings were decent and it was kind of funny when he was like "Um, no thank you" and the music and sound effects were good.
But to be honest overall it wasn't really exciting, the animation was quite static, it had enough movement to be called an animation but just barely, try and put in more frames and character movement next time.
Though there was only two lines ever spoken the voice acting was pretty dull, especially Chica's voice, it sounded really robotic (though I was able to let that slide a little because Chica IS a robot.) though I know none of you are voice actors so it's not like I'm saying "be more professional" I don't expect you to, but give more emotion to it, like the first live with "Umm...No thank you...?" try and make it sound like he's more sound, like for example when actually playing the game audio record yourself and maybe you get some convincing audio from you actually being scared or something. Or try to imagine that same situation, now if your character's not suppose to be scared make sure your character doesn't look scared. When I saw the guy he looks confused yet pretty scared so make sure to bring that same emotion into the line.
When making an animation try and make a storyboard (if you haven't done it already) so you can better plan out the story of the video. So there's some advice, I hope this can help you in any way, keep on animating if you really like it and remember have fun. :)