suggestion for score & stars awarded for moves + time taken

// untested, may contain errors.
// suggestion for score & stars awarded for number of moves + time taken

int maxScore = 10000;
int numStars = 3;

float movesFactor = 1f/(movesTaken-minMoves); // range from 0-1

float timeFactor = Mathf.InverseLerp(maxTimeAllowed,timeForThreeStars,timeTaken); // range from 0-1

int score = Mathf.RoundToInt(maxScore * movesFactor * timeFactor);
int stars = Mathf.RoundToInt(score*numStars / (float)maxScore);