Please add a license to the source.

[poorlydrawnproot]

In the event that other people would like to fork and use this simulator, there needs to be a license.
It is likely an oversight, so please, add a license to the source.
This tells people a definitive yes, you can use my code or no, you may not.
So please, just add a license.
This is the official list of licenses with their pros and cons.

[flybot2010-lab]

This is a re-upload of code that presumably, was written by a now deleted reddit user AnonChickenWalker, with only two saves of his account being made. Other then some mentions of HTML and CSS in some of the posts we have access to, there is no solid proof AnonChickenWalker actually wrote this other then the description for the GitHub.

Since their reddit account is deleted, and legally speaking luesjo12 has no rights to add a license (if this is just a reupload of Anon's code), THIS IS (from a legal view) ABANDONWARE.

There is nobody enforcing the copyright, there is no risk of DMCA, and there is no risk of a seize and desist.

FOOTNOTE: There is no need for a license to allow people to fork GitHub repositories. To quote the GitHub Licensing FAQ (from 2015):
"..if you publish your source code in a public repository on GitHub, you have accepted the Terms of Service which do allow other GitHub users some rights. Specifically, you allow others to view and fork your repository."