I have several questions to help me improve my limited deck building skills:
Assuming I wanted to play the spells I played, is the manabase ok? (And: was it ok to play the 2UU-spell with this mana?)
How could I improve my deck assuming the general plan should stay the same?
Do you see other kinds of deck this pool would have permitted?
I think before I can draft more, I should be able to build good decks in sealed, as I can not screw up that much there
So I'm very thankful for any comment, even when it only answers part of my Questions!
You are slightly removal light and definitely will have flyer trouble. Look to pressure the opponent into blocking with flyers and run them over with big dudes. Save the Essence Scatter for bombs and represent it even when you don't have it. Your blue and green are solid. The Last Stand, Star and Pegasus are playable, but I never want to have to maindeck Knight of the Tusk.
Final thought, the wall might be better as disperse and sided in against other beefy decks. You can splash white when you need Invoke the Divine and Totally Lost and Uncomfortable Chill in appropriate matchups. Also Okenform against removal light opponents. There may be a G/B/r deck, but I don't believe is is better.