things to work on
Your comedic timing needs a lot of work. You didn't take any pauses in action or dialogue, which made the whole thing just a fast mess.
And speaking of comedy, for the love of god, stop using memes. After the 3rd or 4th time, they get really fucking old. this is like the millionth time I heard a rick roll in a cartoon.
The voice acting just didn't seem to fit in a lot of places. You have to strike the proper emotions, you can't just have that dumb crackly voice that's supposed to be creepy.
Use less cliche one liners. They are just as funny a memes.
Don't 'borrow' jokes from popular series. Blockhead is fine, if you're just puting him in there and not ripping an original Swain line, but I saw an obvious joke ripped from the Awesome Halloween Special.
In fact, let me just leave you with this: write your own comedy. Memes, old one liners, and jokes from other series are just lazy writing.
other than that, thumbs up.