We have pushed an update to resolve an issue with achievements not unlocking properly in some circumstances, as well as a full screen cursor bug.
There is also now support for unofficial languages patches to be compatible with the Steam build - including German, Korean, Polish, Brazilian Portuguese, Russian, and Simplified Chinese.
You will need to download and install them externally - there is a list on the Steam forums here.
Thank you so much everybody for all your support (人●´ω｀●)!!