Vector Siege TD

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A defense game with 10 levels and 9 towers, 5 of which are unlockable. Interest rate per wave is 4% so don’t go spending all your cash Spend your XP at the “Skill Shop” after each level. The challenge level unlocks after you’ve beaten the 10 levels. All the towers are unique and the ultimate tower requires Gems(a skill that can be upgraded) to build. Yes, the first few levels are pretty easy, it gets a lot harder as you progress in the game