Irrlicht Engine

I am currently making a retro-styled game and I wanted to make the resolution 640x480, But when I do that, The screen becomes blurry (Old games didn't have blurry screens/anti-aliasing), I'd like any feedback on this.

I built both IrrBullet and Bullet using Code::Blocks and MinGW, Irrlicht works perfectly while IrrBullet crashes the program whenever I compiled it, I changed the linker settings many times and tried everything and nothing seemed to work , Any help on that is appreciated.

I added a scene node for the Player and made him move whenever I pressed any of the WASD keys, and it works, except when I move the Player's camera, I tried doing some math-related stuff in order for it to work, But I couldn't get any closer to the solution, I'd appreciate your feedback on this

I am not an expert when it comes to the event receiver, I would like to know how i can detect mouse clicks/position since I tried to make my own and failed.

How can I make first-person interaction system (to pickup item or press things such as buttons), I would appreciate any answer