I think there should be an option to prevent people from seeing inside a project to prevent people from stealing the code. I have a game called Object Clicker that I just released. I put challanges for people to do and whoever wins the challange gets to choose what object gets added to the shop. The challanges are basically who can reach a certain amount of money in a certain time. I want to make it so people can go inside the project and change what they did to their stats. If there is a way to make it so their stats don't save after they leave the project viewer, that'd be great. Other than that, I definately think that there should be an option to remove the ability for others to remix or see inside. Thanks in advance!

when green flag clicked
say [Who's awesome?] 
Wait (1) secs
say [YOU ARE!]

This is rejected. Hold on, let me find it on the list of rejected suggestions.

The Official List of Rejected Suggestions wrote:

3.2 Disable remixing or censor minor remixes
One of the most important ideas of Scratch is the share aspect. Scratch is a website not only for displaying your work, but also for sharing it with others, and by posting your project on the Scratch website you agree to allow others to remix your work. You are not allowed to write “Do not remix this project” in the Notes and Credits of your project; you may get alerted for this, because it discourages remixing. This suggestion extends to the ability to require permission to remix a project, as you have already given permission to others to use your creations by sharing a project on Scratch; for more information, see this post.

A remix of a project is allowed on Scratch, even if the remix only contains minor changes (this includes recolors). However, when you remix a project, you should put in the Notes and Credits what you changed. If you see a project that contains no noticeable changes, please use the Report button on it so the Scratch Team can take a look at it. This suggestion extends to “extremely minor remixes,” such as a remix of a game that gives you 2 points per second instead of 1. As long as the user explains what they changed about the project and gives proper credit, this is okay.

Please read TOLORS before making a suggestion.

For your project, I'd recommend using Cloud Data and making a leaderboard.