You can drag items and put them in the crafting area. Then push the big red craft button to craft.
Mixing Madness Reborn is a completely new version of Mixing Madness. It's got a lot of new functions, way more detail and HD textures. But it's still in alpha state so don't expect much of this. [Please report bugs in the comment section, thank you :D] Changelog: Alpha 1.0.0 -Release Version