Asar and packaging

Any way of protect or at least hide game files from simple curious? Maybe asar package file or other way?

The graphic or the code? The Js code can be obfuscated and for the images you can encrypt them and decrypt them locally with the obfuscated code

Have you did this? What did you use and how did you do it? (Tools,etc?)

To obfuscate the javascript use: Javascript Obfuscator - Protects JavaScript code from stealing and shrinks size.
For encrypting the images idk how to do it.