Blog post: http://yal.cc/introducing-hxpico8/
Repository: https://github.com/YellowAfterlife/hxpico8
Examples: https://github.com/YellowAfterlife/hxpico8xm

In short, this project permits to use Haxe programming language to create programs for PICO-8 (by transpiling Haxe into PICO-8's flavour of Lua).
This grants you classes, compile-time optimizations, constant and function inlining, and a whole bunch of other "syntactic sugar" features while keeping the output size reasonably small.
For example, this class compiles to this .p8.
Obviously, you can do more complex things with it too.

Have fun :)

Being a Haxe fan, I think this looks very interesting :) The output code looks very clean - good job!

I've never tried Haxe, but this is awesome! =)