optimize some stuff for software rendering
lower background music volume in menu
top-down view
fix transparency (back to front drawing of trails)
or do something else to make trails look better

move cycle behind posx, posy
solve cycle turning issue
move things to integer coordinates

add more & better sound effects

add mouse support

add light effects (shadows, mirrors etc.)

check various TODOs in the code

fix rpm's

win32: sdl should dynamically load 3dfx opengl for Voodoo 1&2
