Arrows to move the light, put the light onto a Darkflare to defeat it, click on a card to summon it, the card fights the Darkflares, you can only choose one card a round, rounds end once your cards defeat enough Darkflares. Darkflares darken the world, you can see how dark it is in the top right corner, if it gets to 100% dark, you lose, try to surrvive as many rounds as you can!
A Darkflare is a flame but it is in increasingly darker shades of blue Song: Mob Smash from super smash bros ultimate