# data[].attributes.body
Good
- train student to think fast

Bad
- no clear instruction on the rules
- too complicated
- easy, medium and hard are not state on the card so cannot differentiate
- game rules should design in card size to avoid missing
- 30 seconds is too limited

# data[].attributes.body
Good
- Train user mind
- Improve user Math

Bad
- No QR code
- Instructions not clear for how to play game
- Packaging box can't close tight
- No answer sheets