Thanks for the suggestion, currently I just loop around all of the points in the loop and check that their centre position is on the inside of it. I think the issue is that they can move out of the loop just before you finish making it, and can come into it after. Or are you referring to pushing the enemy "centre point" towards the octo for better capturing? The only issue I can think of with making it easier to capture is that some enemies, like the fish, are better to be left untill there's a big pile of them for a big capture. I had one game where I managed to score 5k+ points in a single loop when I got 3 stars and a bunch of different-sized fish. The other option is to slow enemies a bit so they don't leave the loop as easily.