I'm sorry, misunderstood you. However, the explanation stands: this is a limitation of the wrapper under your platform. You get to use the entire screen but the window won't go away. We are working on an alternative but can't promise much at this moment... I hope this makes sense Cheers.
Just asking for curiosity, since you use a wrapper, was the game made in html5 or flash?
Anyway, the game is great, kinda reminds me of Super Meat Boy with the short levels, and easy deaths, I'm glad I bought it!
KRUNCH is built on a krunchified version of flixel 2.43 so yes: it is a Flash game. I'm not sure if wrapper is the correct term but that is the first thing that comes to mind In essence, this "wrapper" is similar (superior is a better term) to what you would get should you create a projector with Flash Player.
actually, I'm also asked this because of the full screen mode, I think with flash and a different wrapper it could be possible. games like Machinarium or Intrusion 2 are done in flash, and run nicely on fullscreen with a wrapper, I think.
so, any chance for a borderless fullscreen mode later on?