iron towers are simply useless with that stupid timer.
hard mode is a bit unbalanced. I was in NaN mode and the first boss (lvl8) took something like 10 lvl3 flame towers.
loved the game.
I just don't get how to get the 20 birds achievement and why I don't get the "without break" achievement when I passed without failing a single jump:/
infinite stacking of torpedoes and enemies hiding behind invincible bases are a serious problem, but an enjoyable game.
but each level takes way too much time...
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