@ Pikazard: Sure thing, feel free to use the sprite if you wish. In order to make a game on this site, you need to go to the "submissions" drop-down list at the top bar of the screen, and select 'Submit Game'. Fill in the info for your game, and submit a demo or the completed game, and hope you get approved soon.
As for making the game itself, you'll need a game editor program, usually one of Enterbrain's RPG Maker ones. For those, go to 'rpgmakerweb.com' and check out a free trial. I think all the RPG Maker programs are 50% off on Steam for the time, but not sure?