Little ball jumps around cubes... nothing terribly complex.
I have noticed a lot of fangames (mainly mario and megaman games that i've seen made in that Gamemaker program) don't do jumping right, like, when you jump you always jump up the same distance... most actual games, you jump higher the longer you hold the jump button.
So that is what i've done here. A simple little platform thing, where a little ball walks around on some cubes, can jump, and the longer you hold space the higher you will jump. No external media, written in DBpro (though I imagine it'd work in classic, very simple stuff)