Mario is spin jumping in that cart, but I suppose that's a minor issue.
These gates have some oddball issues with collisions with the cart. Sometimes this screen happens while others just the front cart will do. Either that or I need to put more time running into those things.
This moves by way too quickly. Sure, there's the Start button, but...
Gates near the apex of a slope can prove to be troublesome to be in the right cart since Mario has little time to change when they come into view (though that may tie in with the last screen) and the issue SNN brought up.
I was slow taking the screen.
Empty space, but I feel that prettying the level up isn't an immediate priority.
The Ptooie's ASM needs to be altered so its spike ball harms Yoshi as well. (FWIW, I also use Yoshi and Ptooie in Myrkka Mainline.)
Engrish
"...to win a prize!" not "...to win prize!"
Blindish drop leads into these critters.
Not necessary, but there is a block in the latest base that turns Yoshi into a 1up if he touches it. Then again, since you somewhat require his assistance to complete the level.
Didn't you say this already? This also makes it the third message box in the level.
I agree with the notion that these roller coaster segments should be flipped with one another for the same reason as SNN said. Furthermore, given the nature of the level, I think a checkpoint after the first coaster and before the second coaster segments would be beneficial.
On another note, has the music Moose composed for this level ever been ported? None of the available tracks in the base ROM... fit this level at all.