This really doesn't work well.... I get gaps even after compiling...
For games with different canvas sizes you need to do the orignal canvas width or height. I just figured this out because I have a 1080p game and scirra arcade requires a 800 width game at most, which doesn't work well with 1080p, you have to do some canvas manipulation and some layout scaling, and have window width to 800.... which makes it a pain kinda....
So basically if you have a 1080p game change all the values of windowwidth to 1920 and all the values of windowheight to 1080.... and you will still run into gap problems....
Also there is a flicker problem if you have a texture such as a side walk where you have the first pixel row darker pixel then the last, at least I had this problem. You have to make the edge of the side walk the 2nd pixel row and the first one not.
Also the 60 value may need to be changed based off your perspective of speed.
... Really wish scirra would have just made titled backgrounds have a scrolling option inside the container this would have made things a million times easier....Unforchently pretty much most tutorials covering this is the same.