Our first game, Meditation 5, is now free as in freedom (and free beer). Other than the Vaults of Minos this also affects the assets (mainly the music) except of the font (that I didn't create).
Meditation is a minimalist light gun shooter that should be played with a Dualshock or Xbox-style gamepad (e.g. 2 Sticks). It's probably the most experimental game we made. While the whole thing is simple it offers much room to refine your gameplay. My all time highscore was slightly over 50000.