I want to ask how to update my game. Do I need to download the new version or just the files?
On android, you can download and execute the newest .apk to update your game files. Your save files will still be available, and you can continue to play the newest version with them.
If you're on windows, and you have the previous version (22.01.28 in this case), you can use the "update files" to download and replace only the files that have been changed since the last update to your game.
When your version is older than just one update, the safest way to update your game is to download the newest full game version, and copy&paste the entire content of the www/save folder of your previous game folder to the new game folder.
Both options are explained in this video: