In Part 14 of my Unreal Engine 5.1 Endless Runner series, I add a proper Pause Menu system that works on both PC (Escape key) and mobile (a pause button on the HUD). I start by creating a new input action by duplicating my existing one and naming it ESC_IA, then I bind it to the Escape key inside IMC_RunnerDefault. After that, I build a new widget called PauseMenu_UI with a clean layout: background blur, a tinted overlay, a centered vertical box, and three buttons—RESUME, OPTIONS, and MAIN MENU—plus the “Paused” header. Then I wire up the functionality: pausing the game, switching input mode to UI Only, showing the mouse cursor, creating the PauseMenu_UI widget, and adding it to the viewport. I also set up the Resume and Main Menu buttons so resume unpauses, restores Game Only input, hides the cursor, and removes the widget, while Main Menu opens MainMenu_Map. Finally, I fix the common issue where Escape stops working because the game is in UI Only mode by overriding On Key Down inside PauseMenu_UI and handling Escape there. As a bonus, I show a quick fix for inputs not working when starting from Main Menu by setting Input Mode Game Only in the Runner_Map level blueprint on Begin Play.