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節奏遊戲《Melatonin》在 Steam 上推出 DEMO 試玩版，本作擁有夢幻的藝術風格以及類似《節奏天國》的簡單操作，在夢境與現實融合的世界中挑戰自我。
＂Melatonin＂或稱褪黑激素，是一種調節生物中的激素，可用來幫助入睡和治療睡眠障礙，而本作《Melatonin》如同其名，探討了我們睡著時做的夢和醒著時的經歷之間的關係。
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在 DEMO 中有四個關卡可供遊玩，不同關卡有不同主題，DEMO 中可以玩到食物、購物、科技、追蹤者等，主題也影響了譜面的呈現，例如購物（Shopping）這關節點的打擊就是刷卡的手，十分有趣。
雖然只需要單鍵即可遊玩，但由於遊戲中並沒有實際的指示按鍵，玩家必須仔細留意動畫才能順利通關。
在通過普通難度後，各關卡還開放困難模式可以挑戰。有興趣的玩家可下載 DEMO 版搶先試玩。
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