Shape Diff Matcher

Game Rules
Each Card Has 4 Characteristics With 3 Different Attributes
1. Shape
2. Number Of Shapes
3. Shape Color
4. Background Color

All 81 cards in the deck are unique

Finding A Set
A set is defined as 3 selected cards where each of its attributes are either
a. All The Same or b. All Different
In order to check your answer, tap on any 3 cards
Deselect cards by tapping again