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The animation killed it, you really had a winner humour wise, but the bad animation and the abrupt ending really killed it, don't get discouraged if it gets blammed, but heres a few tips for your future animations;
Don't use the default settings for the radial tool to make blood effects, if you must use the radial tool, then mix your own colours.
Spend more time on your characters, make sure they have detail and shading, even if they're supposed to look poorly drawn, you have to put some subtle detail into them.
Use better backgrounds
If you're using the paint tool for shapes like the shit around the one guys face, then outline the shape with a slightly darker shade of that colour, using a thin outline.
Don't make abrupt endings like that, it makes it look like you didn't finish the cartoon.