Pretty good for first sprite flash
Couple of pointers on how to make it better in the future.
First off, use a FPS of 24 to 30 as it works best for the sprites by smoothing it out and making it flow better. Also use some tweens for the jump motions, it will make it look cleaner. Also, show the stuff a bit longer before cutting to black or it tends to cut the jokes short. Overall it's very well done, but I suggest watching Dumbass Mario and Dumbass Luigi to get some ideas of what's been done, and see what I mean about better frame rate and pauses after the jokes.
Keep up the good work though, it looks great for just starting out!