These cube enemies are called Cyoobs. They wanna destroy your cursor, so destroy them first by slashing the Cyoobs With Your Cursor While They’re Not Moving.
Scrapped Enemy List: Teleporter (Would basically be harmless) Burrow (Same as Teleporter) Blaster (Its hard to get clones X and Y Positions) Poison Trail (Unfair To Kill) Soap (Inconsistent Movement) Sphere Enemies (Didnt Fit in)