Since this is a level pack, I will review it differently. Each Category will be a level.
Layout 1
The first level was just downright bad. I don't mean to upset you when I say that, but there was absolutely nothing really pleasing about this level.
The graphics were very clashy, and there was no scenery to make the level look pretty in any way. I did like the song you used in the level though.
The worst of the graphics was probably this:

They're cut off and look bad by themselves.
My last complaint about Layout 1 was the fact that there was no checkpoints, and the ice flower upgrade was virtually useless . . .
Layout 2
This level was a little better than Layout 1. The graphics were a little more appealing albeit they were still clashy . . . Also, the song in Layout 2 was very
unfitting.
Layout 3
Yay, you used the same song as Layout 1! This Layout had a decent selection of custom graphics, yet they were STILL clashy and you used the conveyor
belt block again e_e. This layout was definitely more difficult with the Podoboos and bullets. To be honest, the use of the bullets in this Layout was more
annoying because giant bullets come at you whilst you're about to land on your next falling block. This layout actually had a lot of annoying bullets. I did
like the long block with the mushroom in the
beginning.
Layout 4
YOU TRICKED ME WITH WHAT SEEMED LIKE STABLE SMB3 BREAKABLE BLOCKS. Ah, oh well. This level's music was semi-fitting. It was actually more
gimmick-oriented than the others so far, with a few paths to take, rather than being so linear-bound. It was also easier than Layout 3, which I found
odd.
Layout 5
NOW HERE WE GO. Comparatively speaking, Layout 5 was probably my favorite. It had some nice graphics in it, and it made me feel like I was playing
Super Mario 3D Land and/or Casinopolis from Sonic! Unfortunately, I don't really have much more to say about Layout 5 since all of these levels were
generally the same exact thing . . .
SUMMARY
These levels were kind of difficult at times, but they were a bit unappealing to the average player. The levels for the most part had clashy graphics which
can make a level seem worse than it really is, but reviewing this level, it wasn't too great. No checkpoints, and a pack with 5 levels that were basically the
same thing that you could probably make up in 5-10 minutes won't really cut it. Sorry I didn't have much to say about each level after Layout 1, but like I
said, they were all the same levels pretty much, just different platforms and placing.
SCORE: 2/10
Moved to Trash Can. Sorry . . .