Plain Pyramid Solitaire Classic involves matching pairs that total 13 to clear the pyramid. i see that numbered cards hold their face value and Kings are removed alone.
You must match pairs that total 13, and you draw new cards from a pile when stuck.
You click to draw cards and click to remove cards. The Draw pile is a stated feature that you click to get new cards when stuck.
Most players focus on Kings first since they are removed alone. Use the Draw pile when stuck to find pairs that total 13.
Q: What are the controls? A: Clicking and drawing are the stated controls.
Q: What is the objective? A: The goal is to clear the pyramid by matching pairs that total 13.
Q: What is one stated feature? A: The Draw pile is a stated feature.
Q: What is the main mechanic? A: Matching pairs that total 13 is the main mechanic.
Start matching pairs that total 13 and clear the pyramid, I think Kings are easiest to remove alone, try Solitaire Classic for a related challenge, numbered cards hold their face value.