sadly only for HTML5
You are able to compile to other platforms using the demo, you will just have to download and install various SDKs before this is possible. It is described in the getting started section of the documentation. The truely free version has not been released yet, so far only the commercial which includes the mojo module, which is a 2D module that provides basic functions for creating 2D content. Later on they will release monkey alone without mojo, and that will be public domain, so no payment will be needed, and it will also be able to compile to various platforms.
I have only just downloaded the demo and played around with it for 30 minutes or so. I will more than likely stick with BlitzMax for application development and larger games, but for small quickly made games I might jump into this new language and see if I can get some stuff made that will work on phones and pads alike.