水平線の反射 Tried making reflective effect on water. Create an upside-down costume and stamp it 10 times with effects (x, size, ghost, pixelate). Slight lag makes it look more peaceful. It requires an upside-down costume (so it's not as simple as just using one costume and setting direction to -90), so it will end up having several extra costumes, but the extra costume allows for costume-specific additions like the white marks for the moon
