How to play Brimstone on Mac

Its a first person, fast paced 3D hack and slasher game, developed by a small studio consisting of high school students. Its at prototype stage, where I'm mainly just trying to game balance the game, rather than making it have godly graphics(we'll see about that). It was originally meant to be a flat shaded, zombie themed, apocalyptic-ish world, but now its a bit darker, and is set in hell. You wield a japanese katana, and you are basically thrown into a deep abyss in hell, with no way to escape. You're meant to try and survive, and kill as many enemies as you can. There are demons and sinners who want to kill you as soon as they see you. You are armed with just a very, very powerful melee weapon, and grenades, health drops and stuff to build with(which you can snap together like in minecraft) and your wits.