I think your on your way
I know this isnt the best mario flash and its far from perfect, but i gave it a 4 because you put effort into this. Most of the mario flash lovers have seen submissions that look like they were put on here just to piss the viewers off. To be honest, for your first sprite flash its not bad. However, if your going to use sprites you might want to use sprite backgrounds also. To me, putting sprites in handrawn backgrounds and senery looks really sloppy. The animations are the biggest thing you need to focus on, as they are the key aset to any sprite flash. Work on making the sprites flow more smoothly so it doesnt look they're warping. Good luck with any future submissions bud. I hope to see progress on em.