King Birb's Quest UI

King Birb's Quest is a 2D puzzle platformer where you, King Birb, are enjoying your vacation from being a video game boss until you run out of milk. On a quest to find the milkman, you must traverse your game and avoid stomping on your minions to find clues to his whereabouts.
Use the mouse to navigate the menus of this demo. While in the "game" after selecting a level, you can use the following controls:
P – PauseH - Lose a heartI & arrow keys – toggle and move inventory slotY - Win the gameS - toggle sound
Note: this is not a game. Just proof of concept for the user interface.
Flow diagram and wireframes below to show process