Sorry for the late reply, as a fellow Kaiju game dev/designer if the Kaiju is playable the camera will be great though if an enemy NPC that would be a fun addition especially if the player is able to to throw him around with his tail like Ultraman did with his enemies. I would suggest polishing the tank as well as making the energy its collecting to be more brighter that way the player overall the gameplay is solid and with some level polish especially with the energy power ups your game will be solid.