Players are entitled to fill in the feedback form after participation, but this is not obligatory.Sometimes operation times and\or days can differ.A common time for the Test Server to be open is 7 to 10 PM in these time zones: GMT/UTC (Universal Time Coordinated), EST (Eastern Standard Time), and PT (Pacific Time).It is open only during 3-hour time periods, several times each day.Currently iOS has changed to via Testflight, see the top of the page to get the link.
However, new paint jobs, new hangars, and new robot slots still cost the gold normally needed on a client, except that all of the new robot slots only need 10 Gold.