(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.
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Excessive lack of .startTest() and .stopTest()
SOQLs in loop
No assertions in Tests
Getting IDs by loop instead of Map(records)
No test data factory or builder
Gigantic Flow instead of multiple Subflows
Exactly 75% test coverage
No Fault Paths in Flows
Multiple triggers on one sObject
Public Read/Write OWDs
Hard-coded ID
Hard-coded authentication instead of using Named Credentials
Only catching general Exception in try-catch
Multiple Record Triggered Flows on same OperationType on one sObject
DMLs in loop
Checking collection emptiness before DML
No flags to deactivate trigger and validation rules declaratively