sorry, i'm not a moderator, so i don't know anything about your submissions, but the moderators are nice enough to send a pm, if you brake any rule and your submission gets deleted... They always tell me the reason why it doesn't gets submitted. You should talk to elrod, josephjo, chrisp or othe moderators who approve scores
I think that rule only applies on the first level. There, if you do not die, at the end a pig and 3 leader mice will appear. If they don't kill you, another group of 3 leader mice appears. Then you fight the boss.
After the first level, I think same enemies always appear. If you die enemies will become slightly slower and less agressive for a while, then the difficulty goes back up to maximum. During all my attempts to beat level 2 I had a lot of different death timing scenarios, I think all of the enemy spawns were the same. Maybe the crusher rat spawn numbers where different, it is hard to count them when they are stacked like crazy.
I don't know how I got the score either. The score counting in Battletoads AC is either totally wierd, or just plain glitched and broken. I just was playing now and I got to level 3 without dying, and I had less of a score than the current hi score where I lost both my lives before the snake boss.
Level 3 will be hard, it seems very long. Still, this game is oddly really fun, and the music is great. You just have to figure out the battle system so you avoid getting attacked after you finish combos. Maybe you and I should write a guide for it =P.