Write the player action
Describe the main action in a sentence and sketch the feedback it needs. A beautiful scene remains confusing if the player cannot tell what changes when they act.
Prototype the relationship
Test movement, timing, and an objective with simple shapes. Decide whether the interaction works before producing detailed art. A rough version makes revisions less costly.
Coordinate the senses
Use image and sound to communicate consistent states such as progress, danger, or completion. Avoid adding simultaneous cues that obscure the action the player needs to understand.