Hey, wezu! I appreciate you for playing the game! I don't know about that thing asking for internet connection. I made it in unity, built it in Unity then made an installer using inno-setup. Could you show me a screenshot when it ask you for internet thing? I really have not encountered it yet. However, for the graphics options. When you hit escape. You can set and adjust the quality and even turn down the resolution. I haven't got the time to add vsync and motion blur toggles so you can turn it off. But you can definitely change the quality for better performance.
I'm glad you tried it! Thank you!