I have a strange behavior with icon. This works:

suspend fun main() = Korge {
    val t = resourcesVfs["korge.png"].readBitmap()

    image(t)
}

However, if I add an icon, the program seems to block at

val t

line so no rendering happens after it:

suspend fun main() = Korge(icon = resourcesVfs["korge.png"].readBitmap()) {
    val t = resourcesVfs["korge.png"].readBitmap()

    image(t)
}

Is it expected?

Context is not set yet so maybe it is normal. You can use

iconPath

instead or in the main block: views.gameWindow.icon = resourcesVfs["korge.png"].readBitmap()