That’s the high level, however t has thousands of micro decisions each time, such as some situations where you might choose to create a hole to maximize a clear

That’s the high level, however t has thousands of micro decisions each time, such as some situations where you might choose to create a hole to maximize a clear later, or when it is better to try to Tetris at higher levels as compared to clear the lower ones to avoid getting too high and therefore harder or impossible to manipulates the pieces properly.