|File Name:||Small Mario|
To begin, the hack boasts many weird and bad palettes everywhere you go. pic, pic, pic. They don't work and they just add to the sloppiness of the whole thing.
Relating to the bad palettes are the sloppy use of graphics. There's cutoff everywhere and tiles are generally just used very lazily.
The most important part, the design, is not really savable. It feels like it was made very quickly and without much thought. In the first level, you run across a huge stretch of land that goes on for most of the level before using a p switch to cross some munchers. Levels should stay engaging; do things that keep the player thinking and doing more than just holding or pushing a button.
Other sections feel extremely repetitive, particularly here and here. The player jumps across screens and screens of blocks with no variation. It's not challenging or anything, just tedious.
The levels were quite short all things considered, at least the parts where the player was actually being challenged. In the castle level, I'll also mention the grinders appear behind the background. I'm not sure why you would do this, but that's not really fair, is it.
Don't resubmit this. Take your time to learn how to make more engaging and thoughtful levels, and make something new and better from scratch. As I said, play some hacks and 2D Mario games if you need some inspiration.