First off you didnt make it where you can use just the arrows, if you try it still registers the mouse, second you did't explain jumping, thrid no way to mute your aweful music, and fourth copyright infringement much?
You collision detection on the platforms is a littlte off, I jumped left into the 2nd floating one in the 2nd room. Also please dont post unfinished games onto kong, stencyl is getting a lot of crap for this and it makes your game look better and get more views if you post a finished well tested game. Good luck stencyling, looking forward to what you come out with in the future.