Hi! PalkiaReshiram here! To move the character, use "WASD" or the arrow keys. To change the elements, press the numbers on your keyboard. There are 8 elements, including your regular bullets. The elements will unlock when you beat certain levels. Every time you beat a level, you get to pick an upgrade and you only get 3 seconds to pick. The goal is to survive. You can shoot using the mouse or the space button. However, I would recommend using the mouse because the person will always face towards the mouse.