复古游戏菜单音乐

Synthwave, light cyberpunk, casual game main theme, retro 80s soft synthesizer, playful cute robot timbre, light arpeggio, gentle bassline, mid‑tempo 95BPM, bright but dark‑night background atmosphere, no heavy drums, loop‑ready, game menu background music, clean mix, low saturation, short cycle loop 45s, no vocals。