You can play only one round before the game locks. Can't play multiple rounds.
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For this version: well, you can play again by clicking on Retry. I saw this bug before submission but had no time to fix it since I was running late on time(i literally had 3 days to complete this game on my own).
And For the latest version(Build for android device): I have fixed all of those bugs :)
thanx for the feedback!