Can't get past level 100. Couldnt press the "Buy lives" button fast enough. Suggest uncapping the max lives to 50 and make it 500 or even 5000 to ensure something stupid like that doesnt happen.
They need to update this version to the one that was used at www.gemtowerdefense.com. Should be able to select any gem to combine special. Also, should have a customizeable setting to increase game speed.
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