You can if you like, but just to save you some time, kjorteo and davidn have already tried using the "Leave" command on everything (presumably for that purpose). Key2 and Sae'krom cannot be discarded.

And yeah, it is kinda crazy that over 2/3 of the achievements and all but 1 ending have been unlocked already. Then again, the simple fact that this little game has taken off as much as it has (including David offering to make a Flash version once 100% Completion has been achieved!), considering I was just being bored.