Long, nice concept, but not good quality.
First and foremost, the flash needs some voiceover work and sound effects, or at least some background music (any sound at all would be nice).
Second, a lot of your graphics need to be readjusted. Some are more than slightly askew from the object with which they are interacting (i.e. robot and outlet), some are partially cut off from the screen ("BEGIN" in MonkeyBall), and some just disappear spontaneously (the main goomba symbol disappears partway into the second Mario scene). Also present was very rudimentary tweening. Especially troubling were the question marks on the box, as they appeared partially off the top surface of the block.
Finally, this flash is set up as an endless loop, but you should put in an END screen and set up a replay button.
Ultimately, I can't give you a passing grade for this flash, as there are too many flaws. Luckily, these are a bunch of tiny problems that can be easily fixed (as opposed to one giant problem), so you should have no trouble following my suggestions. I look forward to seeing the revised product.