NOOOOOOOOOOOOOOOOO. Fix the music. NOW.
It breaks my heart to see such a well made hack rejected because of music break.
I really like this hack. One can literally see the effort you put into this. The level design is overall great. I just love some good vanilla styled hacking (I'm refering to the graphics). You put in lots of variety and you avoided flat design. You keep the player entertained with different challanges and new things to do and or find.
The hack isn't without flaws but, being honest here, which hack (of a certain lenght) really is?
I liked the creativety which could be seen in your level decorations as well as the way the levels are build themselfs.
Now, let's get to the unpleasen part... the "broken" stuff.
If I beat the castle first and the lake afterward, the event caused by the lake overwrites the path to the end castle. This is only a visual flaw, as the path itself of course still works, but it should be fixed.
This Yoshi here looks nice and all, but it killed the Yoshi I left at the beginning of those pipes for I couldn't take him along. Well, to be precise. It didn't kill him, it just made him invisible. Using a glitch, I could then easily kill myself (by accident). So I'd prefer if you removed it.
Those are cape-killable... not really good. Not a real problem but it breaks the whole gimmik of the level. Speaking of that level... it's easy to get stuck by killing a koopa or destroying a shell or whatever. Well, not really stuck but you know. I like the level, maybe just give a few extra chances to hit the plants.
You used the wrong tiles for the diagonal bars here. (Those going from left-top to right-bottom.) You can see the small darker areas? Those are the tiles you usually use when connecting them to a ceiling thingy. There are also tiles which go continuesly with the same color (like the other diagonal ones you have)
Verdict: Accepted. No seriously, I'd totally accept this hack if it didn't break due to music. We already know this is autorected, so do we really have to repeat that over and over again?
Difficulty would be normal
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... what even am I doing with my life?