I just played through it.

You do know the player can just run at full speed and jump across the Muncher pit without needing to shell bounce, right? Thus, I was able to carry the blue shell to the end of the level. Perhaps you could have made it required to do so? Or maybe make the Muncher pit longer, tho it may still be possible to keep both shells, even if you make it longer.

This part was annoying, and the level was too short.

This part was repeated quite a bit throughout the hack as well as numerous instances of bullet bill walls that one could make a drinking game out of. I recommend more enemy variety and less reliance on bullet hopping and spin jumping.

I was able to go over this part, but then I tried going under just to be a little more hard core, but it didn't make any difference. The lower route wasn't any more difficult than going over the top cuz I could just run past the fire.

Lower the time limit a tad. It's too easy as it is.
I do like the overworld, but the levels suffer from blatant edits, repetitiveness, and signs of running out of ideas, not to mention I don't really like fighting original bosses in Kaizo hacks unless they've been obviously modified. Oh, and the last level was too easy and anti-climactic. I stopped at Bowser because I did not feel like fighting regular Bowser, especially not in a Kaizo hack. Personally, I'm also not a fan of requiring the player to finish the level with a power-up and needing it for the next level (that's why I didn't like Enigmatic Mario that much).
Legacy custom music
A site with a non-useless dislike button
SMW hacking channel
