http://www.kiya1.de/beyond/act4screens/Hoxplox0.pngthe imp is explained in the screenshot.
The chest => you will have to be in the end level to eventually get the chest key. Flag all special chests for later <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
Statue => read the note at the door, then search what is mentioned in there - then click on statue to open it and place the ingredients in there. do you wish an exact spoiler? (Screenshot?)