I just downloaded the game but I'm stuck at the login screen. keyboard or mouse not working

How would you describe the difficulty? Length of game?

Do you plan to bring it to Steam? It's the first game in the series so it makes sense to play them in order.

I have started the game and in the main menu I do not have a mouse to run.

Soo, on my Tablet the game is working fine. On my PC, tho, it starts but i cant use my keyboard or a Joypad or ANYTHING at all... Anyone else has this issue or knows how to fix it? Simple Reinstallation and Confirming the Files didn't do the Trick unfortunately. Thanks in Advance!...