Your early work
Was basically ripping off popular flash comics and inserting your characters into them? (And, really, adding nothing of humor to them. The joke from Strongbad was taken blatantly from one of the episodes where he and Strong Mad inhaled helium-filled balloons, and sang the 'High-Voice Group'. Hell, the penguin 'Some Guy' looks to be a pretty obvious rip of The Cheat. You tried way too hard to be random in the TGS spoof, really: Explosion...?)
The voice acting was far too monotone in many places, and the sound effects were hardly there except for the sequence with the horror film sound effect.
The 'word from your sponsor' made my eyes hurt, and could possibly cause epilepsy.
It also appears you have 4 or 5 colors in your working palette, all gradients from one color to black.