Nice level. Short and sweet, but still challenging. I especially liked how you used the big moles.
But I think that the shortcut to the midpoint shortens the level too much. The level is short enough as it is, so it doesn't need to be cut in half. Although the shortcut is well hidden. Maybe it could lead to another section with another star?
And I thought that the bricks looked fine, even though they are a bit blurry.
I really enjoyed playing this level. Short and sweet (my favorite). The extension of the secret area is also well done.
I don't really know where to place this level in terms of difficulty. It might be world 6, but it can also be placed in world 7 as an easier level.