Just scroll and scratch cat will guide you Use fullscreen or you will end up scrolling through the comments :P
Scratch detects the scroll wheel as up or down arrow keys. BUT it only detects it if we are using the "when key X pressed" hat block. So, we can detect if its really using the scroll wheel by putting an "if up arrow key pressed" block, and if it's true, it means we are not using the scroll wheel EDIT : Turns out this is an intentional feature, added in the 3.0 update lol
