Well, looks like Scratch 3.0 broke all my games that use this style of collision detection. Welp.
Inspired by scratchU8's "The Adventures of Mr. Man Guy REVAMPED", I decided to look through my old stuff and remaster one of my own projects. This is the result. Controls: Arrow Keys Left/Right: Move Arrow Keys Up: Look Up Arrow Keys Down (While Standing Still): Crouch Arrow Keys Down (While Moving): Roll Space Bar: Jump