You can phase through a wall right of the village save point
You randomly get a booster
Your damaged at the beginning
Egg Corridor critters are insta-kill (intended?)
Fun plot idea (since you requested N's rooms music): After N flew off the Pokemon B/W, he found the island and used...
Without the fireball, you can't re-light Chaco's fireplace, and the secret passage would be so "secret" anymore. Besides, in a world of robots, teleporters, and insane immortal wizards, I doubt you wold have to light a fuse to set off a explosive.
Great fanfic!! Other fanfics I've read have unreadable spelling and grammar. I hope you won't decide to abandon it (Like some CS mods ended up).
BTW if you search up "cave story fanfiction" on bing, yours is the third result.