Are These Possible in RPG Maker VX Ace? Options

[kallisti]

Hi, my name is Lytta (an alias, and I'm a guy). I am currently starting work on a Survival Horror game using RPG Maker Vx Ace. I had come up with a couple of concepts I wanted to use in the Gameplay mechanics, but, being new to actually using RPG Maker, I'm not sure if I can do these things:

• I'd like to have a difficulty setting. The difficulties would be Easy, Normal, and Hard (the typical ones). Each difficulty will effect slightly different things. In Easy, enemies do the least amount of damage and HP will NOT decrease (see next bullet), but still present a challenge in Gameplay. Normal will have HP decreasing at its normal rate and enemies will deal the normal amount of damage. Hard will have HP decrease its fastest (without being annoyingly fast) and enemies deal more damage. The point being, is there a way I can have things affected based on difficulty? Or will everything always be set one way?
  
• The player's HP is intended to be connected to a phone's battery life. Meaning, if the battery reaches 0%, it's game over. Taking damage decreases battery life, kinda obvious, but sitting still and doing nothing can too. I want it to mimic real life, where battery life decreases on its own, but at a slow rate. There will be "Charging Stations" scattered around to recharge the battery, but I feel that taking damage AND the thought that the battery could die out before you could reach a charger would present more of a challenge. Is there a way to have HP naturally decrease, but at a slow enough rate that it still proposes a challenge while not being too difficult? Like, 1% every minute or two as an example.
  
• A "Sanity Meter," whether hidden or visible. When it gets lower, the player will experience strange things like the buttons not working, the screen blacks out and sounds will be heard (and the player might take a small, random amount of damage), changes in scenery and NPCs, etc. If anyone has played Eternal Darkness, they might get a sense of what I'm talking about. I plan on having things that will allow a player to increase the meter so these strange things might not happen, like candy or drinks or something. I'm still deciding on if I want to use this, but either way I'd like to know if something like this is possible.
  
• Multiple outcomes, but not necessarily just Endings. Certain actions you take, or certain items you've obtained, might effect how people react and whether another person might live, etc. Basically the story changes in minor details on how you play. It won't necessarily change the general plot or mechanics, but taking certain actions to ensure someone is alive when you reach a certain puzzle might have benefits (such as more hints or being able to solve the puzzle faster).
  
• Taller sprites. Not really for the effect of Survival Horror, but more so personal taste. I've noticed the sprites are on the smaller side. Is there any way to make them taller, possibly so the player might be able to differentiate between a child and an adult or someone standing and a person in a wheelchair?
  
• Speaking of sprites, does anyone know of any place (or person) where I can make a sprite of a character in a wheelchair? One of the characters I intend to use is supposed to be in a wheelchair, and it may end up being the main character.

Like I said, I'm new to RPG Maker, and I'd like to know if some of these things are possible. Also, if anyone knows a way to do these things or might have an idea as to how to do them, it would be greatly appreciated if you could provide that too, but if you don't it's okay.