What do you think?, opinions needed for fangame

Alright, so I'm in the process of creating a Yoshi's Island fan-game and I'd just like to get a little input from other fan-gamers. Obviously, I'm going to try to make the engine similar to Yoshi's Island where you can flutter jump, use Yoshi's tongue to make eggs, and throw them. It won't be easy, but I'm going to try.

So anyways, when I get those features down, I'll have to figure out how to set up the controls. That's where you come in.

First question:
Which do you prefer jumping with:
the up arrow, the spacebar, or the shift key?

Second question:
Which key should make Yoshi shoot out his tongue:
ctrl, spacebar, or another key?

Third question:
To throw the eggs, which key would fit best:
z, spacebar, or another key?

My last question is more so a technical question. I would like to use mp3 files in my game, but I know that they can seriously hold up the game's loading time. If I wanted to use mp3's for some of my background music, would there be a way to either reduce their impact on the loading time, or convert them to a smaller filetype?

Any and all comments are appreciated (so long as their informative and not just nonsense). I really want to make this a successful game, so any help is appreciated.

1. Shift
2. Ctrl
3. A so you don´t get in Z/Y comflict with europeans
4. VUplayer, convert them to wma and save them externally. I could help a bit with music, just ask.

Ah, I didn't know that europeans had a different keyboard than others. That'll certainly come in handy.
In what ways might you be able to help me with music?

I can cut them so they loop make them about 1/4 of the original size and I can make it so that the music loads externally, I assume you have no experience at that since you don´t know how to do it.(note, for the external loading a registered Version of GM would be required)

First question:
Which do you prefer jumping with:
the up arrow, the spacebar, or the shift key?

Shift

Second question:
Which key should make Yoshi shoot out his tongue:
ctrl, spacebar, or another key?

I would prefer space

Third question:
To throw the eggs, which key would fit best:
z, spacebar, or another key?

I'd use ctrl for this, or Z.

Hmm, that would be pretty useful. Unfortunately, I don't have my game maker registered, so I might get back to you on that once I have the music all set up for the game.

1) I'd prefer Z, honestly, but of those 3 choices, I'd like Space. You ought to also make an option that lets you decide on the controls because Shift for some people can mess them up.

2) X

3) Space

The Shift problem can be fixed easily, after getting the popup click on options, deactivate it.