• ✓Idea: number bonds — one number splits into two parts
• ✓The left wing tells you one part; the right is the part to find
• ✓Spots sit where the painting really has wing under them
• ✓One bond at a time — never two unknowns at once
• ✓Add a backwards mode: give the total, fill both wingsplanned

✓ = done · ☐ = planned. Every game is built one step at a time like this.