Trello For Unity allows you to easy implements a feedback system for your game in less than 5 minutes.
This are some of the features:
-Create custom cards in your Trello boards.
-Full customizable feedback form.
-Use diferent lists for diferent types of forms.
-Attach a customizable log file to the card. You can select to include the default Debug.Log() entries to get errors or warnings. Also, you can use a custom log object to separate and attach only your custom log.
-Capture and attach a screenshot when the player send the feedback form.