I like it I do graffiti myself so I an see how it spells mosama, I think the blue and white work very well which was a good pick of colours I like the glow effect on your tag however to me it doesn't seem to flow vert well I can see what you were going for but your 'S' ,'D' are totally disconnected from the AmA a tag should have flow and be consistent but that's my opinion,
the 3D isn't bad I like that you added highlights but its very sketchy at the end and the bottom of the 3d are uneven which isn't bad I just personally don't like it,
you tried to keep a flow with the letters them self's you did well in making it round top and round bottoms but you base line (the line underneath the letters) is un even which would of work if you applied that semi unevenness to all you letters because your 'O' "S' and first 'A' threw your structure out of proportion, since it seemed you were trying to make your letters go from big to small your 'S' ended up being bigger them your 'M' because of this you couldn't achieve that effect and with the uneven base line this made it worse and with your 3D not finishing evenly or neatly sloped to the write this also made you un ale to achieve the effect your were going for.
but you show a clear what you wanted your letters to work your 'A' were a bit hard to see because they look like upside-down 'V's if you just made it two lines instead of one you would make this a lot more cleaner other then that try to distinguish between a throw up or piece because it seemed like your trying to do both which can get messy other then that you seem to have a grasp of lettering and seem to know what style your trying to get best of luck and continue practising