這是一個由蛾和菌菇兩個物種為主的世界，身為蛾種的主角「塞瓦浬」因為某些原因而被菌菇種所撫養長大，與菌菇結下家人的緣分且成為了「蘑菇村」的「勇士」，不過潛藏的真相卻突然如潮水般向安穩平靜的生活襲來，在威脅與矛盾之下的「塞瓦浬」究竟會做出什麼樣的選擇？
以經典的2D橫向類惡魔城類型作為基底，玩家將在蛾與菌菇的奇幻架空世界中戰鬥與探險，面對多樣化類型的敵方怪物，搭配機關與隱藏在各處的獎勵與成就。
玩家除了擁有生命值與魔力值，還增加了類似於SAN值的「人性值」設定，會隨著時間流逝而不斷緩慢的消耗，並將「人性值」分成了四種階段，且根據玩家裝備不同的「孢能體」，能夠在「人性值」位於特定階段內給予戰鬥方面的效果，提供玩家選擇自己偏好的戰鬥方式。

MUSHTER

In a world dominated by two species—moths and mushrooms—our leading role Salvare who is a moth was raised by the mushrooms. He has become family with mushrooms and serving as the warrior of Mushroom Village. However, the once peaceful and stable life is suddenly shaken as hidden truths emerge like an overwhelming tide. Faced with threats and conflicts, what choices will Salvare make?

Inspired by classic 2D Side-Scrolling, players will explore and battle within a fantasy world of moths and mushrooms, encountering a variety of enemy creatures, environmental traps, also hidden rewards and achievements scattered throughout the world.

In addition to standard HP and MP, the game introduces a “Humanity” a mechanic similar to a sanity meter that gradually depletes over time. “Humanity” is divided into four stages, and depending on the player’s equipped “Spore Core,” different combat effects will be activated at specific stages. This system allows players to choose and refine their preferred combat style.