Hey guys, there's a problem with the save games. It's really odd as it's just happening here on Kongregate.
Not being able to access the savegame is causing the other bugs such as the mission not ending, and not being able to return to the menu on pause. Trying to get to the bottom of it now, but not sure what's going on :/ hopefully it's not affecting everyone. Apologies.
Thanks for your comments guys, it's good to see the feedback is generally positive. I am working on a sequel and I will take on-board your suggestions for it.