Thank you for your questions.
1. Its no possible to adjust the "camera angle" of the generated sprites. its completly 2d based so the viewing angle is pre-set.
2. Its not possible to add your own components to the creator, you can only combine what is already there.
3. Its not possible to change the animations.
Regarding the resolution, you could try and maximize the window. Windows key + Up Arrow and see if that works.