Belial is a strategy game where you'll be playing a dragon that looks like satan and need to complete the different task to complete the game. You need to first read the mission and how to complete it in the note available in somewhere in the game. You need to find it. Also, you need to find other elements and pick it up from the ground.
There are 4 things shown at top of the screen, Wings, Fire, Lighting, and tail.
The dragon will perform the same trick that you choose. Like, if you choose tail, it will use its tail to hit something. If you choose Wings, it will fly. So, you need to choose the right command at the right time to perform the trick.