Very solid basis for a boss fight game! I really like the impact of every attack, especially the ground breaking and debris flying. At first I didn't know how to damage the boss and progress the fight, I wasn't sure if the HP bar was mine or the boss's. Also, I didn't know that I had to shoot the boss on the last phase until I noticed the little cursor on my 8th or so death. Apart from that, a good amount of action, I love a good boss fight :)