The Game making tool I use is
www.gamemaker.nl, for videogame music, go to
www.vgmusic.com.
One tip, if you're using mixtures of characters from Nintendo, Sega, Capcom, etc..., please, for gods sake, do not mix, for example, Sonic Advance sprites with Super Mario World sprites.
Edit: This is what I mean:
If your game will look like this, I will eat you.