I tried downloading and playing this level but it keeps crashing for me, what version did you use?
I didn't test it at all (I mean, the screens are already speaking for themselves)
When I tried opening the file in the level editor, it crashed for me. I couldn't even open the level. I was using 2.0 and I know you use 1.3 occasionally.
It might be 1.4, a chain chomp and a parachute ice flower is present in the screenshots.
Sometimes, if 38A or 2.0 is used, it should be mentioned in the post what version it was made with, 1.3.0.1 is compatible with 2.0 and 38A (though 2.0 and 38A aren't compatible with each other, also, it doesn't have backwards compatibility because 1.3.0.1 doesn't have certain things in 38A or 2.0).