Comfy games to play?

The only thing that puts me in a zen mood is The Sims.

Its not been cited yet i think, but windward is pretty good for chilling i think, the mix of colors / music / simple gameplay makes it enjoyable and relaxing
its my personnal point of view though :p

Kona would be awesome with that cold feeling,i liked it so much :)

Triple Town
Plantera

Thank you all for your suggestions ^_^

Grim Dawn
Yes, seriously. Hardly cozy for most people. But can be. And with some builds its getting quite relaxing and meditative.
Mouse-only controls, sometimes even without much clicking - just guiding your character through oceans of cannon fodder and loot.
Therefore it may seem casual and meaningless after a while, but stays somewhat rewarding and satisfying due to loot.
Perfect for "relax and not think about stuff".

Life is Feudal: Your Own
Solo\Alone with own server settings. Almost meaningless work at beautiful nature. Boundless grind... but so peaceful and cozy.
Just as walk in the forest, gardening, digging etc IRL, but without so much effort.

Here are some that haven't been mentioned yet!

Tiny Echo (Point & Click) Possibly the coziest game of them all. Mellow music, mellow graphics, and a simple, subtle premise that won't fully click until you finish the game. You play a cute little girl-spirit with one eye, delivering letters across a pretty, naturalistic fantasy world.

Hidden Folks (Hidden Object) A classic Where's Waldo sort of HOG, rather than the adventure fusion things that are common now. Simple, scribbly graphics, with silly sound effects all produced by one guy. You don't need to find everything to move to the next level, so it's good if you don't want any pressure to 100% things.

Lumino City (Point & Click) A soothing adventure game with some reasonably challenging puzzles that have a built-in hint guide if you get stuck. The world is a strange little cardboard thing that the devs handmade IRL. The music's relaxing, it's pretty to look at, and the setting's charming.

Burly Men at Sea (Adventure) A short, colourful folk tale about three bearded men. You fill out a blank sea chart and see what fun little adventures you can get out of it. Sort of like Sunless Sea, I guess, if Sunless Sea were child-friendly and had a much brighter colour palette.

Gorogoa (Puzzle) A short, sublimely beautiful puzzle game with unique mechanics. There's an underlying theme of academic curiosity and spirituality that I enjoyed a lot.

Omegaland (Platformer) This one's quite cheap, but a lot of fun! Mario-style platforming, but with a low-stress map that lets you replay any level you like for extra coins, lots of cute jokes, and some rather fun power-ups to buy.

OneShot (Adventure) A little sad, but very cozy. You're, well, you, guiding a tiny cat child through a dying world to restore its sun. Despite the dark premise, it's a rather sweet, gentle game, with some wonderfully kind characters.

I played a few of them but this is where i would look if i wanted to relax :

Eastshade

Koral

Becalm it's actually free.

Ultimate Fishing Simulator

Everything

Abzu

Stardew Valley

Mini Metro
Slime Rancher

I know just the thing: Refunct
Read my review.

Off-Peak is free and very relaxing, lovely and surreal. If you like it then The Norwood Suite, a paid game by the same developer is guaranteed to delight. There's a free demo of that as well.

The Haunted Island, a Frog Detective Game is very charming and laid back. As the store page says, it is quite short. You can expect to finish it in about half an hour. Do bear that in mind if you want to consider buying it. It is a pleasant half hour.