Hi!
Yes, JSFML can be used to make games for Windows, Linux and Mac OS X. I would not know of any "troubles" you are risking (what exactly do you mean by that?).
There are still a bunch of things to be done. You may have noticed that JSFML has not been officially released yet, but a
test release is out there for people to play with. It should already work on Windows, Linux and Mac OS X.
There is not so much progress at this time, because I am pretty busy with my job and university, but yes, the plan is to get a release candidate out there soon and maintain it during SFML 2's lifetime at least (for the next few years, I guess). The more people who give it a try, the better. If there are any troubles, please go ahead and report them and they will be looked into.
Oh, and don't worry about your English, it will improve over the time.