categorization game for case study 3 (#139)

* added questions (no answers yet) to case study 3, frames 4-6

* food rating game

* modified game completion message

* Delete package-lock.json

* Delete website/package-lock.json

* Delete website/package.json

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Co-authored-by: charlenehuang1 <[email protected]>

Author: qingxin-xia