I plan on the game being cross platform since 99% of the code is ansi c

the first release will be on the windows os

Is it singleplayer or multiplayer?

I'd love to see the main character's sprite when you have it close to complete!

it is single player but i was thinking when i finish the game and quest system, adding a network function to it, i been looking at SDL_net

I know by experience that wedging in network to a single player game can be a bit tricky if its original design isn't a close fit. This depends of course on the nature of the network... I.e. a High Score or a trophy system is much easier to implement than a player <-> player interaction system. Good luck nevertheless :-)