Well, not yet a game.. but soon. use a and d to move left and right, use w to jump, and s to crouch, and jump while crouching on a platform to go below it. To use your sword push space. You can cling to walls by jumping against a wall then jumping again. Once clinging to walls you can jump again or fall by pressing s. I think I'll start working on this again once I've finished my small game library on working on, which will make it much easier to code games like this.