"Works salvation" is the position that we need to have first done a certain amount of works in order to earn our salvation as the result. God's law was never given as a way of earning our salvation even through perfect obedience, which is why there are many verses that clearly speak against that fundamental misunderstanding of the goal of why we should obey it, such as Romans 4:1-5, Galatians 2:21, and Ephesians 2:8-9. Nevertheless, there are also many verses that make it clear that our salvation still requires us to choose to be doers of the law, such as Romans 2:13 that say that only doers of the law will be justified or Hebrews 5:9, which says that Jesus has become a source of eternal salvation for those who obey him. So there must be a reason why our salvation requires us to choose to be doers of the law other than in order to earn it as a wage, and indeed there are many other reasons that someone could have for choosing to be a doer of the law, such as faith insofar as the faith by which we are justified upholds our need to be a doer of the law (Romans 3:31).
So while Noah's salvation required him to do works, his works were practicing his faith, not done in order to earn it as a wage. In other words, while it is true that Abraham believed God, so he was justified (Genesis 15:6), it is also true that he believed God, so he obeyed God's command to offer Isaac (Hebrews 11:17), so the same faith by which he was justified was also practiced as obedience to God, but he did not earn his justification as the result of his obedience (Romans 4:1-5). In James 2:21-24, it quotes Genesis 15:6 to support saying that Abraham was justified by his works when he offered Isaac, that his faith was active along with his works, and his faith completed his works, so he was justified by his works insofar as they were practicing his faith, but not insofar as they were earning a wage.
In Titus 2:11-14, our salvation is described as being trained by grace to do what is godly, righteous, and good, and to renounce doing what is ungodly, so we are not required to have first done those works in order to earn our salvation as the result and we are not required to do those works as the result of having first been saved, but rather God graciously teaching us to have the experience of doing those works is itself the content of His gift of saving us from having the experience of not doing those works. So our works in obedience to God are about God giving the gift of salvation to us, not about us earning a wage from God.
The content of a gift can itself be the experience of doing something, such as giving someone the opportunity to experience driving a Ferrari for an hour, where the gift requires them to do the work of driving it in order to have that experience, but where doing that work contributes nothing towards earning the opportunity to experience driving it as a wage. Similarly, the content of God's gift of eternal life is the experience of knowing Him and Jesus (John 17:3) and the gift of God's law is His instructions for how to have that experience (Exodus 33:13, Matthew 7:23), not his instructions for how to earn eternal life as a wage. So the goal of the law is to know God and Jesus through experiencing aspects of His nature, such as holiness, righteousness, and goodness, which is eternal life.
