**Design Breakdown:**

- **Background Color:** Swap the soft yellow with a light mint green for a fresh appearance.
  
- **Shapes:** 
  - Replace the white semicircle with a deep blue semicircle.
  - Change the orange cylinder to a warm coral color.
  
- **Foreground Elements:** 
  - Introduce a tall, narrow rectangular block in a light peach shade next to the remaining shapes for added variety.
  - Keep the remaining semi-circle in a slightly darker shade of the new color palette.

- **Surface Color:** Change the purple surface to a muted beige to complement the new color scheme.

This reimagined design maintains a minimalistic aesthetic while introducing a fresh and vibrant color palette.