Ok, so this project does seem interesting so far, but I have some things I wanna point out:
1. There's some clashing is some of the screens (The mushroom in screen 3, the high toad and the toad house)
2. The music blocks on the world map are placed very oddly, which someone already pointed out in the old post:
A little note about the world map, you should put the music directly on the Start level tile, and you don't need them around every level. You only need music where it will change, because the music that was playing when you enter the level will continue after you finish. The only place you need music tiles is at the game start and where the music will change (ex: on pipes to maps where the music is different / at the edge of an area where the music will change)
3. The logo looks a little bland. There's nothing really unique about it, and it doesn't really fit the theme of everything being an ice level! How about making a new, ice themed logo? I think that would be pretty cool, and it would definetly fit the episode more!
But other than that, this is a pretty cool concept for an episode, and I hope to see it being done well in the final product! Good luck!