defly.io is one of the best coolmath games unblocked. It is completely free for all ages to play online. The main aim is to occupy the largest area in the sky. So, you need to control your helicopter carefully. You’d better fill regions and protect them with walls. If you destroy somebody in defly.io hacked, you can loot their progress. Once you dodge attacks, you will survive and increase the ability to unlock levels, superpowers along with numerous upgrades. Hope you enjoyed!