Buuuuutttt. I think that 30 seconds is far too long for the early stages, I mean... I got bored! since games are to entertain, boredom is not good.
Now, if you wanted, you could have them be longer at the later stages, or even have those who are good enough start from a faster stage, I don't know how you'd ike to go about it, but think about those improvements. ;D
Addicting and fun!
Nice job, I could play it for hours.
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