What is the minimum investment amount?
The minimum investment is 0.0025 BTC
do you have any personal experience with investing at 64 blocks?
I think you ask to the wrong person

Look at his profile, he is 64blocks developer...
oh, didnt see that
i've already invested in the site but there is just 2 problems, the game concept and idea is good (the layout i think still needs a little work)
1. Not enough players but i see a new sig campaign so i expect alot of new players to be joining soon
2. You need to login every time you're working with a new window (please add remember me option)
And please guys, investors should get a some xp so they should get more from faucet