I have finished the notification system, so important events are now announced to the player. Currently this includes when a friendly planet launches an attack or when any planet is conquered. While implementing the ability to save messages, I also noticed and fixed a bug which would duplicate ships if the game was saved multiple times in a row.
There is also a new feature possible to attach to projectiles- either a gravity explosion or implosion. I think it makes the shockwave weapon feel a little bit more real.
For the next update, I am probably going to add some layers of cloudy nebula-like material to the background to make the background look less flat, and perhaps some floating particles affected by gravity.