Hey! I got some more feedback for you.
The missing part of the bridge is due to a coin being placed there. Try to avoid that.
Avoid putting turn blocks here. If I was small, I would be stuck. So I would either have to kill myself or wait for the time to run out :/
Three things I need to note here:
1. Connect the side and ground together. I use to do the same thing, but it looks better connected.
2. Last time I didn't have enought time to get here with the key. Also babysitting items is a bit annoying. By babysitting, I mean caring an Item through a whole level.
3. Extend the time limit a bit, so the player can explore the level some more. It isn't very fun when people have to rush through the level.
As said before, it looks better with the side and ground connected.
And again, connect the side tiles with the ground tiles. I like that design there =D
Huge blocks of coins should be avoided. Do something creative with the coins =)
If I would of went to get that Yoshi Coin, I would have died. Avoid traps like these.
You might want to place the "Disable Generators" sprite here, so I can't be killed by the scrolling.
Two bad tiles where the bridge meets the land.
Still pretty good level design you got here =D But fix those up and it should be a whole lot better!
P.S.: You have to extend the time on some levels. Also good luck on furthering your hack!