You can win points to unlock cards and items in the shops by completing the tutorials over and over again in story mode. During any mission that has a tutorial, complete the puzzles after the tutorial then leave the mission without winning. When you go back to story mode and start again you will be prompted to do the tutorial and puzzles again. Repeat as long as you can stand it. Once you complete the mission you can't repeat the puzzles for points again so don't continue story mode until you are ready to stop banking points.