Cool game. It took me a while to get the hang of the controls, but once I read the manual (yes, I know), I was able to play the game. That you need to collect 'weapons' on the floors is an interesting twist. And the tutorial is very well made.
One thing I wonder is whether the additional keys/buttons are really needed. Shift left-click to drop, maybe just use right mouse button? Space to interact/F to analyse, maybe click to interact would have worked as well?