This is our first port from a paid game that was created for Android - currently on Google Play.  We had to make, surprisingly, only a few minor adjustments to port it to the web.  Most notable is that all the galaxy arenas are unlocked to avoid issues with saving game states in between sessions - this may have not been necessary but, eh, that was our decision.  In the mobile version you have to complete each galaxy in sequence to unlock the next one.  For sake of time and simplicity though we decided to just unlock them here.  Second minor notable is the laser defenses were causing a huge framerate hit so we reduced their sizes just a bit which seemed to help.  Enjoy!