These collabs might have had so much more potential if you would have thrown most of them together. I'm assuming you were more worried about getting your flash count up, but if you would of thrown these random collabs together they might have gotten around 3.0's and up.
Animation/Graphics - Not bad. I like the menu. While it was simple it was still animated, which is always something nice to add to a flash animation. The Mario scene was just a little rough, but actually animated pretty well. The filler was random, but wasn't much to see animation wise. The Madness scene would have to be the worst animated piece on this collab.
Story/Content - We will start off with the Mario scene since there really isn't any story/content behind the menu. The Mario scene was the exact definition of random. The mushroom exploding was the perfect random part of the scene. I had no clue that it was going to happen and it caught me by complete surprise. The madness scene wasn't that good. It was just simply one person getting shot in the head and there wasn't anything in terms of bullets being shot, backgrounds, or anything like that.
Audio - I loved the music that went on the menu. A very nice choice there. The Mario scene had good background music and sound effects. The only problem again was the fact that there wasn't any gun shot sound effect or anything in the Madness scene.
Overall - You should have put these together man. They probably wouldn't have been considered spam as much and they would have gotten much better scores. Too late now though. =P