And that's how the second day ends

Hey again!
00:00 UTC+2, time to stop for today, I guess!
Today has been quite a productive day: the core of my game is now complete.
It's quite a simple shooter, you are in a ship, fighting an alien boss. This alien boss have simple attacks. But as you kill it repeatedly, it mutates and becomes stronger (or weaker, but it has less chances to do so) and use varied attacks until it dies for good.
Tomorrow will be focused on user interface and data, I guess.