Thanks for the details, and sorry the game is so hard to play right now. Three quick questions so I can find the cause:
Which browser and device are you on (for example, Chrome on Windows)?
Does the tab start out using lots of memory, or does it grow the longer you play? Roughly how many minutes in does it start to freeze, and which stage or screen are you on?
Have you changed any settings, such as ship zoom, object size or screen shape? Does it freeze the same way in a private window?
Also, which screenshot looked like a running game with a menu? Where did you see it, and what did you expect to happen when you clicked it?
