Unity Web Player | Lantern
Left Shift/Click Mouse Wheel - Switch Presence On/Off
Scroll Mouse Wheel/(1-4) - Change Spirit
Click - Place Spirit
Space - Bring up Book/Artifact Menu
C - Place Book V - Place Artifact
Please choose About on the Main Menu for instructions.
Unzip into desired folder then run executable (or equivalent). Unfortunately I haven't been able to test the Mac and Linux builds!