PC and ScummVM
The PC games will occasionally require ENTER, ESC or other for general forward and back navigation. The Trackball and two buttons next to the spinner act as MOUSE and Left CLICK/Right CLICK respectively - which will be needed to navigate some game menus.
Some PC games will pop-up specific keyboard inputs for in-game use, so reference the input map below. Despite the remapping we've already done the inputs on the PC games sometimes vary depending on the title, so you'll have to get familiar with each game.
For ScummVM the ESC button will always exit the game. Use Trackball and Left CLICK/Right CLICK to play the point and click games and navigate menus.