I don't think I've enjoyed a space game that much since Tie Fighter. I really hope this does well enough that you do a sequel or six. I had no issues with the controls on Firefox 11.0 on Fedora with Flash 11. Though there might be one small bug. In the system on the middle of the right side of the stage, after doing all of the missions and buying all the upgrades the available upgrades count was stuck at 5.