Core ball is an addictive online video game that you won't be able to put down! Zigzag your way to high ratings! Coreball ("Core Sphere") is a classic mini-gallery game that can be played online. This video game is based on a concept from a 2015 console game called AA Round. The objective of Coreball is basic: you need to hit a round in the core sphere without hitting any other rounds. Stick it on. You will move to the following one when you complete the current level by effectively tossing all the balls.