Thank you for playing! You need to aim for an asteroid and press right mouse button to capture it. As soon as your beam turn green, you'll start analyzing it. It will take some time, depending on size of an asteroid. At the end of analysis, it will show how many diamonds you'll collect from it. Just press middle mouse button while you are attached to meteorite to collect them.

Thank you! And yes, it's a bug. When you collide with enemy sometimes you get stuck.  You can always catch flying meteorite and pull it to squash enemy and free yourself)