mountain climber, character Celeste, intense expression, determined posture, pixelated style, retro, 8-bit texture, vibrant colors, challenging platform, spikes, narrow passages, precise jumps, high difficulty, unlockable levels, C-sides, hidden collectibles, heart-shaped objects, crystal hearts, end-game content, side-scrolling, dynamic lighting, chiptune soundtrack, speedrun potential, advanced mechanics, mid-air dash, wall jump, stamina gauge, exhaustion animation, victory pose, triumphant, celebratory, mountain peak, clear sky, panoramic view, 3/4 composition, bright sunlight, pixel art.