The button was for DEMO snow mode, which is now no longer a thing in 0.9 because seasons have been implemented. The button you're talking about no longer exists in 0.9.
Sorry Maksymus84, the snow is from the Christmas event, which currently cannot be turned off even by changing the season in the saves screen, and can only be rid of by changing the date of your computer to be November. A LOT of people have been having FPS issues with it, so I'm sure the devs know about it by now.
Play 0.8 then, I actually really recommend that version. There's also a mod for the version on Thunderstore which makes various aspects of the game go slower so if the day length setting still isn't enough, that may help. Then, when you've learned 0.8 and like the game, THEN try 0.9, as it changes a lot of things, but a few things are still the same. The learning curve will be less high, but still need to learn new but familiar things.
also, did the mandatory tutorial not teach you anything about the signal table? That seems like equally important feedback to give!
I'd like to suggest a sort of "peaceful" mode (sorry, Minecraft was the first thing that came to mind trying to explain this :P)
A mode where there's no shark and you can just create stuff without the worry of a shark gobbling it all up. I got so scared when I was just trying to make essentials and hadn't built anything and the shark came and ate a quarter of the raft ;-;
