• ✓Idea: work out a times-sum in a grid, like on paper
• ✓Write in the boxes with a finger/pen, or switch to typing
• ✓Type mode checks itself; a "show the answer" button helps
• ✓A happy sound when it's right + Beary's encouragement
• ✓On a village backdrop, works on phone & desktop
• ✓Add more, varied problemsplanned

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