1. Whether game download or on the usb pungi stick. Are you able to do reinstalls on the pc due to unforeseen pc replacement or pc hardparts replacement?
Yes, the game is really oldschool in all cases.
It's an exe plus data files. Just put the folder on an USB stick and transfer it to the new hardware.
Also you can transfer your highscores and settings, wich are stored in ..../MYDOCUMENTS/MYGAMES/Eve of Destruction!
2. Will EoD 3 be available in retail dvd package in the near future? or only avail. in usb stick and download?
I didn't want to offer DVD's cause of pollution and DVD's often make (read/write) troubles.
The costs to burn it in a factory are to expensive.
And I'm sure >90% will load it from the website.
But it's no problem to burn it on a DVD by yourself! You may store it wherever and how often you want (though the license is for 1 PC of course).
3. Will we be able to input songs into a music folder when using a vehicle in the game, like BFV?
This is not in the game yet and I never heard about that. Maybe cause I purchased it but never played BFV

Sounds like a good idea and should be no problem to implement it. I'll try it tonight

I've played around with live-streaming. There are lot of radiostreams wich could be implemented but I'm not sure about the copyrights.
But doing your own music into a folder is for sure ok!
4. Able to use Joystick and/or gamepad type controllers in Eod 3?
Yes and yes. We've tried joysticks and gamepads, also PS-4.
I don't want to talk about smartphones, xBox and Wii, wich are not tested yet, but it should work with everything.
This is the plan though the first version will be available for PC only.
5. Approximately how much Harddrive space does EoD 3 utilize?
I didn't make a build for a longer time cause it takes a lot of hours.
The last build was 4 GB and this is what it looks like the size will be (uncompressed).
It's a looooooooooooooot of stuff!
Just another thing: the license will be: you can play with 1 player per license on whatever hardware you want.
So you can copy the game on a USB stick and take it to a friend and play at his computer.
But you won't be able to play both with the same license.
(Of course I know there are million ways to crack everything but I count on honesty and good souls

).