Lunatrap
This is my result on i7 2600, Radeon HD5870. Without debugger i got about 60 fps on PC (Chrome and NWjs), on galaxy s3 i got the 51-56, on note4 i got a smooth 60fps.
My object count is less than you but my collisions check is higher. Maybe image memory usage ? Or some logic causes it ? I didn't use any is overlapping trick yet. Don't forget to disable collisions and animations on static sprites.
This is basically a super mario platformer kind of game.