Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
Mad Rat Dead Demo does not have any trophies. This is because it is a demo and/or soundtrack, neither of which typically get trophy lists. The full (i.e., paid) version of the game likely has a trophy list.
A rat's dream has been left unfulfilled before his death...that is, until he gets a second chance at life! Granted the opportunity to redo his last day on Earth, you must utilize the rat's newfound power to pump his heart in time with the music, lest his own time runs out.