I wanna play something like SMW again, but way bigger.
The games are indeed way too short. It makes me feel like my games are longer than usual
Got a little arrogant there...
If there's a game exactly like SMW (graphics, gameplay, etc.) with twice or even 3x the number of levels (and maybe selectable characters which you need to enter certain areas to unlock even more secret levels) for the DS, I'd buy it.
I even returned Yoshi's Island DS because I completed it too fast (not all 100 score, but I did get all the character coins). I was lucky that the store was closed for a couple of days, so the "trade within 24 hours" rule didn't apply, so I could return it the next day the store opened and get 2 other games for that value.
Mario Kart DS, on the other hand, I play time to time. Eventhough it has the second most amount of tracks (Super Circuit had most), it still feels like there aren't, by far, enough tracks.
I've fully completed Super Paper Mario too

. Why are those games too damn short...