Yep, I've done that many times. The shell simply bounces around a couple times, then flies out on the top and goes back to the lower area. I pick it back up and throw it again, same result. The block won't activate no matter where I launch I from the pipe. Maybe you give it some momentum? I'm not sure if I've tried releasing it while jumping forward.
I was taking the second p-switch since I ran out of time drilling through the blocks, being too careful dropping down to the lower door.

Thanks for the tips, seeing it can be done is usually half the work :) At least I was on the right path.

Meanwhile I was dumb enough to start the 100 mario challenge on expert. Based on the parade of levels I saw there I would rate this game 3/10 at most. I much rather bang my head on your levels for hours than play that random crap lol. Too bad you don't unlock anything for being the first to clear a level or clearing a hard level. I guess it could easily be abused, but the 100 Mario challenge is the worst game design for a game like this.

That's the alternate mode of the telephone sound effect. Shake it.

You need to give it just a little momentum.  Tap forward just a little, and go back once you've released the shell and it will likely work.  I know it's not too easy, which is why I supplied the spawning green koopas.

I find it very interesting that there are people out there that manage to fail an automatic level... :-|

It´s because they don´t understand is an automatic level and they try to jump or do other stuff

I'm making a new level, the visual design has taken up most time so far, but I think I nailed the theme. Now just executing (hehe) the ideas that are in my head.

All I'm saying is that it has Yoshi in it. If you thought my last level was cruel to him (her?) you just wait. :)

Oh and it's not puzzle orientated this time. Or at least I'm not planning there to be any.

Was able to get my universe level played on Twitch! It starts at 1:47:33 in the time stamp. Link: http://www.twitch.tv/retrowyze/v/17805338

I decided to take a break from MDMAlliance's hardcore levels and beat all of yours :) Can't say it was any easier lol. Seems a common theme in your levels is to mislead and confuse the player. Plus some of them look like memory corruption lol.
That level you posted above, yeah screw the p-switch. I used your hidden backdoor involving yoshi and shortcut straight to the exit. Same with Ghost house and Your gonna die. Caestel Mayhem was the most difficult and I'm not sure if I found the most efficient path. In the end I settled on making it forward to the star shooting bill launcher. Grab the star, go back to the door linking to the upper left, grab another star and run to the right to the door over spikes that ends up right behind the exit.
It was fun to find the right path, nice set of meta levels to be solved in the editor. Now can you upload any of those without the built in shortcuts ;)

My new level is done. It's called "The Yoshi Sacrificial Pit". Hope you like it.

7B2D-0000-007C-BF4F

You can download every level and check them out in the editor ;) Not that hard to backtrack from the finish that way and find your 'secret' doors and blocks. You tricked me the first time with pound those coins which I decided to load in the editor to practice. There I noticed the shortcut. So when I did the Ghost house flying box one I didn't wait to long before checking if you had a similar exploit, so I went along the top. I got close the normal way yet all those fire bars and barking dogs are impossible.
Or do you mean you're going to die with the flying ? block at the start? I stole the cloud there to fly to the door that connects to just before the bridge.

How did you make those busy levels btw? Randomly pound on the screen then add a path :)