I have a problem with the buttons, I don't know if it's just me, but when I press "alt", it throws me out of the game
I really like the camera mechanics :)
The same thing happened for me, playing on PC. It didn't seem like the alt key was necessary though? Pressing ctrl to pick things up and pressing ctrl to put them in the battery / to go to the next level worked just fine without ever needing the alt key.
Either way, I really liked this game! The animation at the end was a nice touch too :)