i think crit is ok on this forum. I really liked it, and grats for a 3+ on your first flash.
point 1: i would suggest making your own mario sprites. Ive never been a fan of mega pixles, you lose track of whats where.
point 2: Music, you need more. If you had music play through the whole thing you got have gotten a 4 in my opinon! Also, by music, i dont mean one thing playing the whole way through, i mean for example: fight scene some epic high paced music. for the explosion bit, a sort of sound track that makes someone feel stupid. Its a tough and tedious job, but worth it!
overall, had quite funny bits, and was extreamly well done, just needs some trimming off the edges