There are some very serious problems with this. Note I started with the profile.dat where you start at the new stuff.
* Is maching gun required to do this new stuff? Because I don't think you can make it up the left side of the island with out lvl 3 machine gun. Where you zone after the "rooms" with Polishs.
* 99% of the time fighting the enemys is not worth the time. Fighting them obnoxious, skipping them = easy. You don't mean to do it but you encourage the player to skip enemys rather then fight them.
* The maze with shootable blocks. Can't put my finger on it, but something here just isn't fun.
* Change the sparkle that takes you to cloud house to a door. When you use a sparkle, you do NOT expect to travel somewhere else. I spent alot of time clearing blocks, I don't want to zone and have them all respawn. If you change it to a door, at least we know what to expect.
* Cloud house, why is it here? There is nothing to enteract with. Have the table and or computer say something. It's a useless zone.
* The teleporter takes you to the plantation jail 2, then when you use the teleporter there it takes you to grasstown shelter. This punishs players for exploring.
* The "boss fight" where you fight lots of rabils and igor's is very easy, and very time consuming.
* Getting +50 HP for that fight is TOO much... I know you want alot of HP for the new hell, but don't give the player that much hp before fighitng undead core.
* The event that ends in Misery teleporting you to canada does not reapear if you die. Maybe because of the skipflag? Whatever the reason it's a huge issue, that must be fixed.
* Canada... I like the music and the background. I didn't for 1 second of playing Cave Story think that the setting of the game was the real world. Going to canada just felt stupid to me. Sorry if this is offensive, but this is like fan fiction when people put there self into a story with fictional characters.
* Canada... there are diolog problems with lots of characters, you can fall straight of the map (it looks like when you go off the side it will zone you), its wierd seeing the same characters over and over, and all you do are boring fetch quests. I hated this zone, and can't think of any way you could make it better.
* When you beat Canada you are taken to outer wall. Here I have some questions for you. To get to the new hell, do you have to restore Curlys memory? I noticed that I have the mushroom badge so I assume yes. Also where does the 2nd explosive come from? Or do you just keep it somehow after using it on the shelter door? Anyway... Most important question: if I were to go up outerwall, go thru last cave, and beat undead core, would that let me get to special hell? Because I didn't want to risk it, and instead I went left thru egg corridor, and back up the left wall. This felt like unnecissary back tracking because I just did all that. So... I hope I didn't have to.
* I already said this, but Misery, doctor fights, and undead core are too easy with 100 hit points.
* Getting to the new hell takes too damn long. And durring part of it you'r at random risk of taking damage from the falling rocks! NO NO NO, do NOT put random unavoidable damage. Its cool that you fly up into space, but its just too much down time. If you die you gatta sit thru all of it over again. Not fun. Some of the clouds overlap the rocket, but not you, I don't know if thats fixable, but it looks very wierd.
* Hell... Did you even play test this? Its cool that you added a new background but it makes almost all the enemy projectiles almost impossible to see. Mixed with the shaking, it hurts my eyes after a while. The only intellegent way to actually "fight" many of the enemys is to just stand over them and throw fireballs down. If you had snake (which might not even be possible to have because of the NEED for machine gun on the left wall) then the best way to fight them would be shooting downward thru the ground. So... you arn't really fighting these enemys. Best way past is again, to just run past. Get hit by something that does low damage... then spam on blade of missles or whatever. Fighting rows of just purple critters is the only one where you actually have a fun way to fight them.
* Hell 2. Way to many enemys. The background gets in the way more because its much more open, and its even harder to see enemy projectiles coming. The abundance of Fuzz Cores means that you should just take a hit for 1 damage and keep on running. I mean, I have 120 hp. I mean, durring speed runs people always just skip fighting enemys. When people will want to skip enemys in a regular game, that is a problem.
* Hell 3. This one is the most enjoyable. The enemys are actually fightable, and don't just cover the entirty of the screen. The blue spikes are really hard to see. You added 2 new plot diologs, donno about the first one, but it's possible to get "stuck" in the first one. By "stuck" i mean as soon as the text ends, it will start up again before you can move... so it basically forces you to quit the game, or read about hell's nebula till the end of time (maybe you can move a pixel between diologs, but it'll take forever to get out. Also it dosn't stop your momentum, so if you are run jumping the text starts and then you fall on spikes, very annoying.
* The Big press is one of the bosses that glitchs when you add new maps. How do you intend to make it work inside a new map? It'll have to teleport you to normal hell, and make you save the game and open up boss.exe. That will start over the nikumaru counter btw. Same problem applies to ballos.