It was good while it lasted...but I think it should have been longer.

lol that was interesting, I think you could have done more with it though, just saying

It was funny, but it was also too short. You could've added more material into it.

hahahha good work ! very funny

It was decent, but it didn't make me laugh, which is what you were driving for. The sudden and slightly confusing end made me watch it a second time to figure out what happened. Make the animation longer, put in a few more jokes related to the game (i.e., have him jump over the pipe, but a Pirahna Plant comes out and bites him, there's a pit on the other side, etc.), and don't end the flash so suddenly. It kills the experience for the viewer. Also, do't use dialogue. This would have been an excellent Flash had you used SFX (like Mario getting angry) that would have actually made it funnier. Text distracts the reader and takes too much time away to comprehend what's just been read, and detracts from the humor.

Good job on this attempt, but I'd love to see a revised submission.