Eggstravaganza

Summary

Since there is no max value for duration, you can easily save some gas with unchecking the value endTime in the function startGame. As it is impossible to overflow, there is no need to check it and pay the gas for it.

Vulnerability Details

endTime = block.timestamp + duration;

Impact

By not stating the value as unchecked, you pay a gas fee for every time the function is called, which you easily can escape.

Tools Used

n/a

Recommendations

Add unchecked for the value.