Thank you for taking the time to review the game.
I will check the controller you have mentioned.
Regarding the achievements: If you have acquired the game outside of steam, the steam integration won't be functional. It is a different version of the game. As a result, the achievements are not available.
The review is based on game downloaded and played on Steam 2-3 days ago, so the achievements should work for me ("successfully redeemed a retail CD key for this product and added it to your Steam library").
I may offer a suggestion of an easy to implement (really, just dialog) slight improvement for the ending, but posting it in open is too much of a spoiler. As I don't see a way to PM you here, please befriend me on Steam, if interested.