For fucks sake, change that name. PLEASE. It's horrible and feels like a joke hack.
I've always liked short hacks, but to be honest, this one needed more work, but don't give up; this hack has potential. It can be a good hack if you work on it.. so, the main issue was the difficulty. Even though the difficulty was marked as "Kaizo", the first level and the second level was somewhat easy, that I thought it wasn't gonna be hard. I was wrong. Oh boy, I was sooooooooo wrong. After those levels, it got insanely difficult. It was like you wanted it to be a normal hack, but then decided to make it a kaizo one. I think you should hire a few testers for your hacks, they can point out issues and give you helpful advice. Anyways, let's begin to review the levels..
Yoshi Hills
Firstly, it starts great, (and I really mean it) but then it turns out to be an evil and rushed level. Please don't rush your levels. If you don't know what to make, take a small break. Go look at other hacks and screenshots. You might get an idea for what to make. Anyways, as I said before, even though this level feels like a somewhat easy level, it has got unfair traps and places you can get stuck until you run out of time. I wouldn't have minded this if it was a kaizo level, but this level just doesn't feel like one. Either remake this level to feel like a kaizo hack, or remake the other levels and this level a bit to make it feel like a normal hack. As for other design issues, well, it spams stuff. Especially coins. Seriously, the player doesn't need that many coins. It's just a place to get free lives. Secondly, the berries. They look just weird when you put 234056920842097 berries on only one bush. I suggest you to put only one berry on a bush, and maybe add more bushes, because the time really wasn't enough. I suggest you to add bushes with green berries all around the level because the time made me panic alot, and even though I ate all of the berries, I were only able to finish the level with 58 seconds, which was pretty bad. Even with more berries, I suggest you to add at least 100 to the timer. Oh anyways, enough with the timer stuff, another issue was that I found the level pretty long for a first level. I suggest you to shrink it. Also, I think that the secret 1-ups are way too easy to find. Try to put them in places a player proably would never think to go.. oh and, before I start about the aesthetical issues, let me tell you that the blue yoshi can be used to skip most of the levels, so I think you should just remove it, cause just a red yoshi is enough, and that I found this level quite repetitive, as it feels like you've copy+pasted some parts and edited it a bit. Oh and, be careful when you put these coins and question blocks/note blocks. See; screenshots.
..is it time for me to talk about the aesthetical issues? Yes, it is!
Firstly, this level really needs more decoration. It's really empty. Not a really major problem, but it'd have been great. The other issue is that it has cut-offs. Like, lots of them. Like.. lots, and lots, and lots. Again, I suggest you to share some stuff with people and ask what they think, so you can improve it.
Yoshi Mountain
This level was also ok, but it had some NEW and different issues. Cool. Firstly, you should be careful where you put those fuzzies, they can easily glitch out. See; screenshots. Also note that the level can easily be skipped using blue yoshi. In this level, it was super easy to do so because you've put koopas and it was easy to feed yoshi, so yeah. Anyways, one of the main issues in this level were the invisible question block usage. It was used again, and again. And again. And maybe again. Proably once again. It got really boring to do the same thing for 541247165220778970 times. You put some good ideas in this hack, yet overused them. Not cool. Also, like the level before this, it was like a normal level, yet it had a really goddamn hard jump, and if you had a mushroom, you just had to give it up. Ugh. Also, you gave a p-switch near the bullet shooter, so the part where you actually should get the p-switch is completely useless if you bring it there. After this level, you go to a sublevel that feels like a night and has a bit weird palettes (see the note block). Also, when you touch the note block, you can see glitchy graphics. A simple graphical edit and ExGFX could have fixed this; but then you won't be able to use the saws, cause they would be glitchy this time, so I think the only possible solution for this would be using STEAR to remap the sprite, or download a disassembly of it and edit it's graphics routine. Don't know ASM? Well, that not a big problem! You can always use Sprite GFX Creator by JackTheSpades!™ This level was somewhat challenging, but that was only because of some tricky jumps, thwomp and saw placements. Also, why were there 2 shells at the end? I found them completely unneeded. Another issue would be the 1-UP placements. They were way too easy to find. I had 38 lives when I finished it! 38 FREAKING LIVES!
Oh and, before I stop, I have to mention that this level has cancer. Sad, isn't it? It's got graphical cancer. It happens when you don't put enough decoration and have lots of cut-offs in your levels. Don't you also think that's sad?
3 trials castle
Now, this level was nice. It was actually kaizo. It had good ideas, but you overused them to death. Also, I wasn't able to make the last jump to Reznor's room. Was it possible? I tried 15242162049 times yet I wasn't able to do it. There also were cement block spam. Not nice. It also had sprite header issues (?) so parts of the sprites didn't show up, and sometimes, they didn't show up at all. Please fix this.
I'll cut this level short.
Screenshots
1 - I found how you made palette 6 grey a bit weird, I mean, everything else was happy and stuff, yet those were grey and dead looking.
2 - ..why are they floating up there?
3 - OH NO
THE YOSHI
ITS AKLFİKASFİDKİGWEGİESGDGVİ;EBG
999 - more AKLFİKASFİDKİGWEGİESGDGVİ;EBG yoshi
Verdict: Rejection
Difficulty: Kaizo