Added new levels and achievements.
A total of 20 levels and 40 achievements are available.
Secret achievements need to look inside the enemies, you have to destroy them all to find the right one.
Improved ship control.
Fixed bugs.
Big update
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.