Curiosity. How deep will you delve to know a truth? Mortality/immortality. Locked/unlocked. What hides in our mind, behind its daily tasks it does like clockwork. Do we dare to face our death (rot)? Do we dare look to angels, cling to religion (rot)? Or do we shut out eyes and play at life in a 9-5 utopia ( also rot)?
The lock does not fit the key.
Basically, breaking it down here, the kraken represents the depths, the skeleton the death, that weirdo angel is organized, over legislated religion. The phenological map suggests our compartmentalization of ourselves in daily life, and the bugs suggest the rot behind all the ideals.
Now you know.