Bro can you guide how to defear kraken in floor 16 the river monster it's so hard to defeat him
I just face-tank him lol

or try killing him with the bow.
Now real talk - if this is your first playthrough, you should know:
- This is a grim game -
by design it will be hard and you will not do well on your first try.
- The ending of your game is largely affected by time limitations.
- It is intended for you to play it multiple times in New Game+ to get all endings.
If you are having a hard time with a boss - just go back and farm money to upgrade your equipment. As mentioned before - this will waste your time and affect your ending but it is intended to be like that.