The battleship enemy definitely needs some work, because like you say and I'll admit, it can be really hard at times.
Glad you liked the new ship design! Eventually all of the enemy ships will be the same way where you can destroy them piece by piece.
The green laser will play a larger role in future demos when you need to destroy larger shields. Also, in addition to stopping enemies, it also prevents some of them from firing.
Awesome, that's great that fullscreen mode worked well on your laptop! G key to go back to windowed mode should still work. I noticed on my computer that I sometimes have to press it more than once if I try and do it from the menu screen.
The odd part with the "back" button is due to the programming language. Not much I can do about that one. But because it automatically takes you back it does save you a button press.
Thanks again for the great feedback!