Bed temp could be too low but most likely, your nozzle isn't snug against the bed surface enough. At any point on the bed, you should be able to slide a piece of printer paper between the nozzle and the bed and hear a scratching. Check out your bed calibration settings.
3D printer help. First print attempt. Bed level stripes test
Ender 3 - V2 with auto leveler installed
Doesn’t seem right. What’s the issue? https://video.nostr.build/1a5f1d3ca1fdccea6bc8ae0591beb76f8283b9e59891e54701400be4bef679fa.mp4
Discussion
Some people use glue sticks, hairspray, or masking tape to increase bed adhesion too, but your glass bed should be fine.