Gravity Whores

From the letters page: World of Lewds's Gravity Whores is a puzzle game made with Unity, currently no longer updated. Themes: fantasy and parody. Presentation uses 2D art and animated scenes. Available for Windows, roughly 326 MB.

From the box: “Gravity Whores is both a visual novel, and a point and click adventure game exploring the Town of Gravity Falls. You play as Guy, a paranormal investigator who's come to Gravity Falls on behalf of Bill Cipher.”