'Kay, so I've taken the liberty of playing through your mod...
I was pleasantly surprised! This was a lot better than I thought it would be. Still some issues, but it's generally pretty good so far.
Here's some things I noticed while I played.
★I kinda like the graphical changes, oddly enough. Quote's facepic notwithstanding, the odd lines and general disheveled state everything's in gives your mod an interesting atmosphere. I like it!
There IS a little white line above the door graphic that probably isn't supposed to be there, though. If the door outline is cracked, maybe the door should be, too? Actually, I just realized the random line is part of the cracked outline. You should probably move that down a bit.
★It's obvious something terrible happened in First Cave, with everything being so cracked. I wonder what?
★"(Y)ea(h), but who are you?"
★Quote probably shouldn't know the name of the cave...
★"You know (t)hat!"
★"(Y)es."
★"(Y)ep."
★"...a mushroom in Mimiga (V)illage..."
★Try adding a <NOD right before the "Nope" spoken by King. I know you already said you tried, but...
★Now where's Toroko?(Remove this period->.)
★That Chinfish is scary...
★I have to wonder how that Clue didn't become unreadable from water damage, but it's not too important.
★I like how the Polar Star is a light gray, and the icon is olive instead of green. It adds a little to the general feeling of decay, which is good.
★You can still shoot the environment after it's been destroyed. This goes for pretty much all of your destroyable tiles.
★Similiarly, most of the items can be grabbed again. I think you're forgetting to delete the entity, as well as <CNP it into an entity 0.
★Like Hayden said, the clue you get in Yamashita Farm still says to check below the sprinkler. Because of that, I pretty much had to guess to find out that the Shack block was shootable.
★Sandaime's text is a little repetitive...
★The damage numbers do a weird shaking thingy. Was this intentional?
★The Shack is kind of a twist I wasn't expecting. At first I thought Balrog had good intentions, but...well. My, Quote's a little gullible, isn't he?
★You should probably make a different map for The Doctor's proposal. It's still called Studio Pixel Presents, and the ground looks a little odd here. At least the bubbles aren't there, though.
★Kind of odd for him to refer to himself as The Doctor, don't you think?
★I like the dark background in Egg Corridor. It provides a nice effect.
★The sudden music changes are a little disorienting. It's a nice effect, but you might want to recheck your H/V triggers to make sure it all makes sense.
★Igor doesn't go anywhere because of the walls, so maybe you should have him teleport out or...something?
★Cthulhu's second line is unchanged, so it doesn't make much sense in context.
★I noticed a rather bizzare glitch. After killing an enemy, you can shoot the area it used to inhabit. It's like, you shoot a critter with a level 3 Polar Star, right? Puff of smoke, crystals fly out as usual. But if you shoot again, you'll hit the tile where the critter was. Puff of smoke again, no crystals. It's no longer shootable.
I have no idea what could cause it. O_o
★If you accidentally fall into the battery acid rather than pick up the Booster 0.8, there's no way out and you die a cheap death. Perhaps it's a better idea to simply give a way to jump out via a block, and not include the Booster at all? It's never needed besides this one section.
★The fight with Igor was...what.
I think it can best be described as "WTF". In a good way, though.
★However, if there's a block falling down when you kill him, it will still hurt you afterwards, which is kind of a Kaizo trap.
★There's a space in "...take you the the docto r!" which shouldn't exist.
★Wait WHAT WHY AM I SUDDENLY ON THE MOON
★The Moon is pretty cool, but there's no indication or hint whatsoever of what you're supposed to do. I merely got lucky by shooting the right block. You should really make it less of a guessing game.
★The maze was pretty awesome, so nice job on that.
★What is that red thing inside Nothing? I can't interact with it. :<
★Also, starting in Nothing there's this really tedious bug. For some reason, the camera scrolls ridiculously slowly. I'm not sure what you did, but it persists in Balcony, too, so I haven't gone past it.
★Also, you should probably keep the Machine Gun red. It'd also be nice if you could take the inventory away, since you play as someone else.
That's all for now. Nice job so far!