Great way to challenge ones brain

Though the time made me nervous and fail a lot! xD

Great

loved the riddles. i just couldnt get the ones concerning series of letters. not too good with those.

I don't get it

How is four half of five?

Good......

The game idea itself was pretty good but the only problem is that when you get one wrong you have to start again from the beginning, You should try to make it so that you get a percentage at the end of how many you got right. Hope the comment is helpful!

Don't break the continuity

You have some interesting brain teasers that I haven't seen before, but the arrangement in your quiz is a big problem. The quiz should not end when you get something wrong. You should just have a tally at the end, maybe with a time penalty for incorrect answers. As it is now, it's just a matter of remembering the answers and clicking them as quickly as you can. Within half an hour of this game's release, people have already been raping the scores, getting times under 10 seconds. Has this helped you develop your understanding of the leaderboard?

And for the number of sides in a circle question is too ambiguous, as 3 of the answers you've placed are acceptable.