The Judicial Branch houses the Supreme Court...the highest court in all the land. The Judicial Branch's job is to interpret if laws are constitutional or not, as deemed by Marbury v. Madison.
The United States Congress is made up of the House of Representatives and the Senate. Representatives and Senators are to create laws. Additionally, each house has different powers as well.
From the President, to the Vice President, to the Cabinet, there is so much to learn about the Executive Branch of our government. Yes, this branch is to enforce the laws, but the branch does so much more.