This quick post covers a personal example that might help make your future games more intelligible. After receiving some useful feedback, I noticed that most players struggled to grasp the idea of my project, which is why I was motivated to fix the issue. Here's the comparison: 

Abstract difference

• Highlight the relevant element (health bar in this case)
• Address a particular element by matching its appearance ("Use Toggle to balance" and the health bar splitter are both red)

Feel free to check out the before version: https://itch.io/jam/benbonk-game-jam-3/rate/1106225