Oh dear...
Well, a 'Flash DS' isn't the worst idea ever, you just went the wrong way around it. Pictochat was basic, but it could of been worse, you could made it look more like pictochat though, like the keyboard ont he lwoer half of the screen, and add colour selection.
There wasn't much else ont he DS it self apart from a pointless reset button.
Then theirs the Mario game, it seemed alright at first, but you didn't use Actionscript well. Mario jumps way to high, you have gravity on to high or something, the fireballs aren't effected by gravity, then there wasn't even a whole level, after the shy guy it was just a pit of doom. I jumped off and didn't respawn, and also couldn't see the Menu button because it went along with the level.
So, you have so good talent kid, you just need to practice more and you'll get much better at this, don't worry.
-Peace.