Hi,
I do not know if you are still looking for tutorials, but id thought id share my favourite:
It is a really good introduction to making the main elements of a 2d platformer using Unity and playmaker.
After watching all 5 parts i was quite confident experimenting further myself.
Only issue is I do not think he provides any sprites or other project files to work with. So I recommend that before watching it you locate some free spritesheets, that you would like to work with. Which overall is a good experience, also you can take the opportunity to learn drawing your own. For the tutorial you will need:
-player sprite (walk, hit, jump, land animations)
-Ground enemy (walk anim)
-Airborne enemy (fly anim) - at least one, although you will be taught to program two different ones.
For importing sprites into unity and getting them ready for the above tutorial, you should use this tutorial:
Probably the nicest tutorial out there for this, covered over multiple parts.
There are others that I have skimmed before, but these two I remember being the most useful in setting a good foundation for using unity and playmakerin 2d games.
The platforming tutorial is really good, I though it was clear and basic, but very informative for me as a noob. Also it is without any backtracking or too many mistakes being made, like in the 2.5d platformer tutorial that is available on youtube (still search for this 2.5d one too as it has useful, playmaker specific info, but watch it after you have a better idea, then you can spot his mistakes before he makes them lol, rather than being totally confused by them).
Hope it helps...