Clear random maps one by one at your own pace. There's no need to hurry. You can also save your game and come back to it at any time. This allows for a much more casual playthrough.

I might update this with a better UI and more game modes if anyone is interested.

Also, in case your savefile gets corrupted (for example, if the game crashes while map information is still loading), the plugin creates backups every time you successfully load your savefile. You can find those in the "C:\Users\USER_NAME\OpenplanetNext\PluginStorage\RogueMania" directory, where all the savefiles are.