Easy "11-00110001" achievement...
	Various Steam Achievements...

The screen rotations on the final wave of the Boss are the same each time, as follows.

90 degrees counterclockwise
180 degrees
90 degrees clockwise
180 degrees
90 degrees counterclockwise
180 degrees
90 degrees clockwise

Make your move based on where the enemy starts, instead of where it ends up after the screen rotates. For example, during the final Boss' third wave you can use the following moves.

Hit 1: Point down and hit the square using the 180-degree turn.
Hit 2: Point at where the Boss triangle began.
Hit 3: Point at where the Boss triangle began.
Hit 4: Point opposite of where the Boss triangle began.
Hit 5: Point at where the Boss triangle began.
Hit 6: Point at where the Boss triangle began.
Hit 7: Point at where the Boss triangle began.
Hit 8: Point opposite of where the Boss triangle began.

Follow the indicated steps to earn the corresponding Steam achievement. To view your achievement progress and stats, open the Steam client, select "Community", then search for the game hub for "140 (PC)". Click the "View Stats" option in the drop down list, then select the option that displays the achievements for your account.

Unlockable	How to unlock
01-00110001	Complete the second mirror stage.
10-00110001	Complete the first mirror stage.
10001100-01	Complete the first stage.
10001100-10	Complete the second stage.
10001100-11	Complete the game.
11-00110001	Complete all mirror stages.