The thing is...I don'T want to spend too much time into a game-project if I can't finish it anyway due to a lack of nice graphics...

Well even though showing off some previous game-projects, though using C++:

A kind of 2D-Minecraft+RPG Game, but never finished it


and this one was my first game-project ever...also using C++...it's very old and doesn't really show my state of skill:
http://www.youtube.com/watch?v=MB0ov1zxsgM