Really fun, quality Romhack! Lots of level diversity, good challenges, nice music, and includes some cool custom objects / platforms!
The "Casual" label in the description is pretty inaccurate though, and you'll feel that as early as Course 2 if you're going for all the stars. The difficulty aligns a lot with SM74, though I found this one more challenging overall, especially the last couple courses. I think "Medium-Hard" or "Hard" is a more fitting label depending on if you're trying to 100% it or not!
Thanks for porting this one to Coop Deluxe! I enjoyed it a lot!