Background dithering

• dithering added to the background gradient
• fine-tuning on code level possible - explained in the deep dive doc

Power-ups!

• added power-ups that are dropped by aliens and can be caught by the player
• M+ increases movement speed
• S+ increases shooting speed
• they last until the player loses a life

Level counter added

• level/wave counter shown in the top-right corner of the screen

Different level backgrounds, names in hi-score, bugfixes

• added different background gradients for subsequent alien waves (generated procedurally from a starting colour)
• added ability to give your name for the hi-scores table
• minor bugifixes
• more doc and code deep-dives

Premature death fixed

Bugfix, where invasion would happen prematurely, because the game code treated the invaders "block" as always having its full height, even if some rows were fully eradicated.

Initial Release

The initial release, as build by Fable on its own, with no prompted or manual fixes whatsoever (it is slightly buggy but very much playable).