fantasy adventure, Deltarune, RPG game, pixel art style, teenage protagonists, Kris, Ralsei, Susie, alternate universe, Dark World, Light World, puzzle-solving, turn-based combat, friendship themes, character development, magic spells, diverse monsters, heartwarming moments, mysterious lore, school setting, chalk portal, card castle, Lancer, Rouxls Kaard, Jevil, Queen, cyber world, digital aesthetic, neon lights, retro gaming, chiptune soundtrack, teamwork, choices matter, emotional narrative, hidden secrets, Toby Fox, indie game, detailed sprites, engaging plot, immersive world-building, dynamic lighting, shadow effects, 3/4 view, colorful environments, detailed character designs.