fantasy video game world, Deltarune, pixel art style, vibrant colors, character ensemble, Kris, Ralsei, Susie, action pose, magic spells, animated expressions, Dark World, card castle, checkerboard floor, glowing crystals, ambient lighting, digital art, isometric view, dynamic shadows, adventure theme, detailed textures, interactive environment, game UI elements, 8-bit soundtrack, nostalgic atmosphere, engaging gameplay, multiplayer, puzzle-solving, boss battle, heartwarming moments, friendship, teamwork, determination, indie game, Toby Fox.