I would appreciate a list of all the levels with secret exits without spoiling how to reach them. I would like to search for them but I don't want to waste my time looking in levels that don't have them because the game does a horrible job letting you know which levels have secret exits.
Well it should. I spent the last hour looking through 1-4 and 1-5 thinking the secret exit leading to the cannon was in one of those two levels only to find out the exit's actually in the tower even though there's no obvious path that can appear from there. That's ridiculous!
TC's just making the (fair) criticism that the game doesn't even have the courtesy to tell you which level you should be blindly jumping around in to find a random beanstalk. The Super Mario World system was 100% better in this regard.
I understand the point TC is making. However, the other side to the argument is that secret exits are secrets for a reason. If they were obvious, they wouldn't be secrets. Hunting for them isn't a complete waste. At least you're adding to your coin total.
Currently Playing: Ultimate MvC3 (PS3), Mario Kart 7 (3DS), LoZ: Skyward Sword (Wii), SFxT (PS3), Mass Effect 2 (PS3), Hyperdimension Neptunia (PS3).
^ In SMW, all of the non-ghost houses with secret exits had red icons on the world map, instead of yellow.
On-topic, this should help you out.
World 1 Dungeon World 2 Ghost House Mushroom World 1 Mushroom World Ghost House World 3 Dungeon World 3-4 World 3 Ghost House World 4 Ghost House World 4 Dungeon Fire Flower World 1 Fire Flower World Ghost House World 5-1 World 5 Ghost House World 5-A World 6 Ghost House
That should be all of them. Hope it helps!
Rainbow Dash is best pony. Love and tolerance FTW!