You can compile one, from the resources listed under 'Levels' 'Graphics' ect. But only when the project leader/s agree that their is enough nsmb-implimented resources to make a release pack.
The first version. Contained 1-1 and 1-Castle BROKEN LINK - version lost
0.2 / Update 2/4/10
1-2, 1-3 and 1-5 added. 1-2 is unfinished, 1-3 is currently in-completable. 1-5 is a rope level. Beta ? Block added. No animation yet. BROKEN LINK - version lost
0.3 / PATCH UPDATE
Blue Ring Version
Blue ring added. Some general improvments. Unreleased to pubic. BROKEN LINK - version lost
Lots of improvements thanks to mspeter97. Unreleased to pubic. Version lost. NSMB beta is being developed again and open-sourced in this thread. All new stuff will appear downloadable separately in the sections and patches with a certain level of completeness will be released under Release Packs.