Shark moods add modifiers to the round. Some are good, some are bad. Here's an example of how a very moody shark can affect your round!

There are currently 19 moods to find, and there's always room for more!
Every time you select a shark, you now have a 40% chance for a mood to be selected. (and then another 40% chance for a second mood, and so on.) So it's a little rare to run into a shark with the maximum of 4 moods.
But if you want to maximize your chances, you can jump into the next new system...
This system comes loaded with 12 unique, scaling difficulty modifiers to keep your runs interesting.
Briefly, these modifiers are:
Increase how many rounds are required to win, up to 30 rounds.
Decrease how much health you can lose before game over.
Decrease how many stall turns can be lost before receiving penalties.
This is the existing difficulty multiplier setting, which has also been removed from normal play.
Increases shop and prize pool prices.
Decreases how many options you have for the next round.
Increase the minimum amount of moods applied to every round.
Gives every cue a cooldown timer, which disables their special effects for a set amount of turns. You better hit your shots.
Feel like having with one 8 ball in your rack isn't hard enough? Try five!
Permanently disabled up to three pockets for the entire run. (Yes, this means on Neglected felt you only have one pocket to use.)
If you're missing the sweet sweet dopamine of unlocking something but don't want to delete your save, you can use this drink to relock items if you lose.
Skips break phase.
This system is unlocked by winning 5 runs. If you've already won 5 runs in the past, it will unlock automatically.
Also in this system, you can now change your pool ball set and table border cosmetics! Just for fun! You can play with your favorite balls now!

You have to win a run on a felt to be able to use its cosmetics.
And in the spirit of that, I've added a new one!

Consider it Funky felt's older brother. Every rack ball starts as a random special ball, but this now includes shark-specific balls. Additionally, every ball is a random material and has a random effect applied.
This felt is unlocked by winning a run at drink level 20 or higher.
With a new felt comes just a couple other additions as well.
Lastly, (and kinda leastly,) there's a new ball unlocks menu. The previous menu had some errors displaying balls correctly, but since it was also annoying to use with a controller, I elected to simply replace it.
Added two new achievements:
Added small sound effects to many buttons throughout the game
Added extra effects to the shotgun cue
Adjusted cue preview line, it shouldn't get stuck in walls now
Fixed 8 balls sometimes not costing extra health
Fixed a typo in Did you see it?'s shark description
Fixed Mercury's -50 points popup happening more than once
Fixed Pluto's -30 point popup displaying the wrong number
Fixed Pluto's 30 point bonus not properly deactivating