Hello everone. I guess I did this when I was away last month. I started programming with a brand new game engine, http://snowkit.org/, and started fiddling with when I came with an idea : port a old flash game I liked before and bring it to the graphical design style of today. So I took hte idea behind Square², brought my magical keyboard and in no time, I got to a playble and fun prototype, almost finished of a html5 game.

Made with Haxe, It can be compiled for Windows, Linux and Mac, even though I don't have the targets to compile.

Enough talking, let's play! Just move the mouse to avoid white squares, pickup orange ones. Music courtesy of Xorus.

Because I wrote it in Haxe.

Haxe is a compiled languages which targets multiples platforms and this easily than porting a source code into another language. I.e. with snõwkit I can compile in the targets said previously and I can be sure that I'll have the same result on the targets. The code which interact with a specific target will be only used on that one. You can thus make wrappers to have a stable cross-system program or game.

Okay, let's sau I have a source file (here a .hx)), the Haxe compiler for isntacne will compile into a JS file as it could compile into a binary executable.

Yeah, I think this is quite close than the definition. I'm not sure about cross-compiling term itself but here is the quick "What is Haxe" on the language's page.

The Haxe Programming Language
The Haxe programming language is a high level strictly typed programming language which is used by the Haxe compiler to produce cross-platform native code. The Haxe programming language is easy to learn if you are familiar already with either Java,C++,PHP,AS3 or similar object oriented languages. The Haxe programming language has been especially designed in order to adapt the various platforms native behaviors and allow efficient cross-platform development.

Oh, Stupid am I. Take JS, PHP, C++ and misc languages as intermediate for targets.