Hi sir... here's my take on your deck:
Flash WILL pawn you. It IS literally faster that you...
Staxx will make your 6/1's uncastable, thus making flings and berserks useless.
GaT will stomp you. His dryad is bigger than your 6/1's and IS permanent.
Tinker + Colossus will ruin your day. Swear...
Fish will just counter your spells then drop a Mage and name your keycards.
Goblins has Mogg Fanatic to spit on your 6/1's...
Channel + Disintegrate will 90% be Misdirected back to you.
Storm (Long) will either combo out, or combo out. It is Inevitable.
About the mana base...
Too many "remove from hand" cards.. Yes I know, Groundbreaker and Ball Lightning have pretty heavy costs, but those creatures are NOT fitted in vintage.
Try this list instead if you are really a fan of R/G Beats:
Maindeck:
Artifacts
4 Aether Vial
1 Black Lotus
1 Lotus Petal
1 Mox Emerald
1 Mox Ruby
3 Skullclamp
Creatures
4 Kird Ape
3 Magus Of The Moon (Ruins duals)
4 Mogg Fanatic (kills many men: Welder, Bob, Small Dryad, slivers...)
4 Skyshroud Elite
2 Stingscourger (kills Colossus... virtually)
4 Tarmogoyf
4 Tin Street Hooligan (kills Browns...)
Enchantments
4 Seal Of Fire
Instants
4 Lightning Bolt
Basic Lands (For your Moon protection)
1 Forest
2 Mountain
Lands
1 Strip Mine
4 Taiga
2 Wasteland
2 Windswept Heath
4 Wooded Foothills
Sideboard:
1 Stingscourger
4 Pyrostatic Pillar (Kills STORM)
4 Seal Of Primordium
3 Ancient Grudge
3 Pyroclasm
The list came from:
http://sales.starcitygames.com/deckdatabase/displaydeck.php?DeckID=23667Enjoy, have a nice day!