The game is simple and fun. However there are quite a few bugs, like if an online player shuts Down their game, mid fight, then you get stuck on a ‘waiting for opponent to reconnect’ screen. Same goes for some upgrades of power cores, you Press either ‘attack’ or ‘defense’ to power up, and the game Will leave you on a frozen screen. But the biggest issue I have encountered is for some reason my power cores doesnt seem to remember that they have been tiered up to the best gold tier, so after every restart of the game (closing and restarting the app) I lose my tiered up power core, along with all the other power cores I spelt to tier it up. Done this like 4 times hoping that the game wont nuke my power core. But every time, it is gone. All in all. 3 stars for now, hope they fix the glaring issues.