Hey, this hack is close, but it breaks a couple rules we have, one for hacks generally and one for kaizo hacks specifically. I'll go through a level-by-level list of critiques for the purpose of helping the creator see what to work on.
Here are the rules I'm citing:
Clean use of graphics (e.g. avoiding 'cutoff', 'glitched sprites', and 'background garbage')
"Kaizo" hacks must strive to avoid exploits which allow sequence-breaking.
And, now, the levels.
As noted in this picture, you can just kinda jump into the ceiling slopes. This actually happens throughout the hack, sometimes allowing sequence breaks.
This is very similar, but the hack is using the wrong slope-assist tiles, so you can kinda just walk into the walls:
The solution is making an actual slope-assist tile look like a wall to put under there. Just using a regular wall tile lets you kinda sneak into the corner there.
Similar thing here, but also there's some cutoff below the end of the slope. By cutoff, I mean there's no edge to the tile (it looks like you placed a tile from the middle of the ground below the slope):
You can also walk through the dirt under the goal tape, but pointing out every specific incident of this would be tiring and redundant, so I recommend just going back through it all yourself.
It does look like, here for example, you're using the wrong part of the slope, so there's cutoff every other tile that lets you walk into the wall again even in the middle of some slopes:
This is less severe since it's just kinda how vanilla tiles work, but there's some cutoff here around the munchers. I don't know if it needs fixing in order to be accepted, but I figured I'd point it out just in case.
This is also less severe, but the sides of the water here are technically cutoff:
The beginning of the level has a whole bunch of places you can clip into the ceiling again, but the main thing I want to mention here is that you can just fly under the second half of the level with Yoshi and the blue shell, avoiding the actual obstacles.
One thing I want to mention generally is that, since the switch palaces don't lead to overworld events, they don't count as exits, so the actual exit count is 16 instead of 18 currently.
That said, I couldn't actually confirm anyhow because the title screen graphics have written over the small numbers, leading to the final exit count to read as follows:
Again, I don't think this in itself is rejectable, but it's worth noting since I'm already writing this up.
Also also, this is definitely Kaizo: Intermediate and not Kaizo: Beginner.