Just tried it out...nice! I do prefer the mobil device controls though I'm sure things will get better for the pc controls. Will we be able to use controllers like other platforms? The reason is I found it less fluid as it is in the mobil version: ie, my mouse just is not my "PL trained thumb", nor can I multi task as in the mobil with fingers from both hands touching the screen. Things on the mobil my left hand does is now added to task my right hand does: such as emotes, quick chat, sometimes tapping on the enemy with my left hand while hitting auto-attack with the right hand, going to menu and all the options there are now right hand actions. More duel hand balance would help. Some quick commands such as: auto-attack, stim packs quick fill, menu and all the buttons for those.
But is was really nice listening to it on my sound system and seeing it on a much larger screen! So far I did not have any hang-ups.
Have you done everything on both threads for this? There are a couple of links, one for updating your Google browser (also you need to change a setting), closing and re-opening it, getting SL from the link Samhayne provided. I was in hurry the first time then went back and carefully read both threads, everything worked as mentioned for me then. Here is the Google link http://www.google.com/chrome (to change settings for playing go here: chrome://flags/; scroll down to the one that says native client; then click enable, close the browser and reopen) and for the SL pc game http://account.spacetimestudios.com/starlegends/. Hope this helps?