What do you think?

I'm feelin kinda bummed out about my deck. It's not doin so well now that I'm goin up against medium opponents in Quest Mode. I could really use some help tweaking it. I'm open to all suggestions and criticism. If you think my deck sucks, please be blunt and tell me exactly what you think I should change about it.
CREATURES
4-Nadir Kraken
2-Jaces Projection
2-Faerie Vandal
2-Avian Oddity
2-Tide Skimmer
2-Dungeon Geists
2-Queen of Ice
2-Gadwick the Wizened
NON CREATURES
4-Frost Breath
4-Mass Manipulation
4-Opt
2-Omen of the Sea
2-Rousing Read
2-Jace, Ingenious Mind Mage
LANDS
2-Castle Vantress
2-Mystic Sanctuary
20-Islands
This deck focuses on drawing cards to pump up my creatures and tapping my opponents creatures. I don't know what I should take out or put in or what. I really need help.
CREATURES
4-Nadir Kraken
2-Jaces Projection
2-Faerie Vandal
2-Avian Oddity
2-Tide Skimmer
2-Dungeon Geists
2-Queen of Ice
2-Gadwick the Wizened
NON CREATURES
4-Frost Breath
4-Mass Manipulation
4-Opt
2-Omen of the Sea
2-Rousing Read
2-Jace, Ingenious Mind Mage
LANDS
2-Castle Vantress
2-Mystic Sanctuary
20-Islands
This deck focuses on drawing cards to pump up my creatures and tapping my opponents creatures. I don't know what I should take out or put in or what. I really need help.