Is the smart contract well-structured, and broken into logical functions?
How many different Clarity functions or design principles are used?
How unique or innovative is the mechanism smart contract? Has it been implemented before?
How powerful or robust is the functionality the smart contract provides?
How applicable is the smart contract to use in real-world situations?
Does the project come accompanied by a comprehensive documentation or README?
Is the code commented thoroughly so anyone could read through and discern its functionality?