It may be related to the focus: If the game is not focussed, it pauses. If you play in window mode, try clicking the games window again so that it gains the focus. Otherwise, when playing in fullscreen, try alt-tabbing to desktop and then return to the game.
But we're also working on a small bugfix (fixing a problem when loading old worlds sometimes), it will be released within the next 1-2 hours. We will change some stuff related to the focus, maybe that fixes your problem 
Thanks! 
Does it happen only since the latest update? Any errorlog created?
A small bugfix is available! Three of the bugs have nothing to do with the latest update, but have been there since a few versions.
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Changelog Bugfix 2014-10-20:
This issue should be fixed with the latest version. Please check it out and let us know if the problem still occurs
That would be a possibility, something similar was already planned for objects like a crew tent, which would be large enough to go inside. We wanted to introduce a camp bed for example, which has to be placed separately from the tent.
We will think about it Currently the shelter should be more like a "temporary solution". In the future, it will probably collapse after a few nights. We simply wanted to give you the ability to spend the first night in it, since you won't be able to craft a house before nightfall, and objects like beds or tents will require wool or textiles for crafting that would be difficult to acquire the first day
Yes, definitely. We want to introduce several different ores (e.g. coal, iron, copper, silver, gold) as well as different materials (e.g. marble, sand, sandstone). So it's currently just a placeholder that most stuff is made out of stone
Thanks! The tent is a single object, but in the future, we also want to offer such a "wall of leaves" also as construction element (for example for roofs), then it would also be possible to build something like the shelter by hand With the exception, that you can't interact with it of course...
But apart from that, we want to add more objects like the shelter. I think they will also be the primary objects in the planned "Stranded"-Gamemode in the future.
Hi folks,
finally the new update is available! As already mentioned in the previous news, this update mainly introduces the extended construction system. Currently only wooden planks are available as construction element, but more will follow shortly.
Since the extended construction system has a lot of functions, we introduced a new help overview for this which can be accessed ingame by pressing F1. This new help is currently available when placing constructions or objects. We want to expand it for everything else in the game, so that F1 becomes an universal help key.
Apart from the new construction system, we have a small suprise: Grass is now no longer visible through objects, items and trees. This feature can be disabled of course, since it does not come for free in terms of performance.
Another aspect of this update is a new object: A simple shelter, made out of sticks and leaves, serving as a sleeping place. A workbench is not required to craft it, so you should definitely be able to craft it before nightfall.
Last but not least this update contains as usual some minor changes and obligatory bugfixes.
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Full changelog:
Is this the first gamestart? On the first start, the launcher downloads all required files, so if you was never able to login, all gamefiles are missing. The first start requires an internet connection, and you have to make sure that the game is not blocked by a firewall or something similar.
[...] but make sure that you can find out if water is clean or not [...]
Maybe the contaminated water can be a little bit darker or look more muddy, or you may hear flies or something like that. Anyway, the safest way will be to boil water before drinking
[...] will the whole ocean become undrinkable?
Saltwater is undrinkable all the time, isn't it? 
However, if an animal dies in water, I think it's reasonable to limit the area that becomes contaminated. Now if the water starts flowing, it can be mixed with clean water of course. If contaminated water flows into a lake or ocean, only the water around the entry point can be contaminated.
But we will see, since it's still a long way to go until water is in the game
That was originally planned, but depends on how performant that will be. We'll see
Yes, both is planned! Temperature will be more dependent of the current biome, in the desert you quickly become thirsty, and in polar regions you start freezing unless you have warm clothes or make fire.
Deseases are also planned, for example you can get sick when eating raw flesh. The idea of water contamination sounds really interesting, we keep that in mind and will come back to it when animals and water are implemented
We also want to implement something like stamina, which will be affected by temperature and deseases.
The thing about an age tree, where each branch has an individual limit, sounds pretty cool, but that means that there are many sub ages/movements (e.g. steampunk) and our items and objects in the game don't have enough variation to "fill" those individual ages. For example the furniture: The current chair or table look simple, with an old wood material they fit into medieval times, and with a new wood material they fit into modern times. But there is for example no typical victorian chair.
I'm afraid it could be difficult to have individual items and objects for each age.
I guess we should stick with a line, and reduce it to just the most important ages. Perhaps we can extend it in the future
Thanks! Water is indeed an important (and tricky to implement) feature, we're also curious to see it in action 
That's a fantastic idea, I really like it! 
We will implement this after the next update!
You have any suggestions for ages? Perhaps something like Middle Age->Renaissance->Modern Age->Future...
That's good to hear! The world has a total height of 1152 blocks (a block has a size of ~0.5 meter), the surface has a total height of 256 blocks, so on average there are ~1000 blocks under the surface. On the bottom, you reach the hell (but it's quite an empty hell, we haven't worked much on it yet).
We're planning to make caves longer and deeper (too many caves are just too small), and in the future, we want to implement dungeons. Some of the dungeons should become really large, for example reaching from surface to hell or something like that.
I'm glad to hear that! Thanks again for your patience!
