OK, I played with the screws a little bit and got the derailleur to move the chain to the first gear (and then to the spokes, but I fixed that). Now I need to make it able to to move the chain to the highest gear (smallest cog), but I noticed something, which I don't think happened because of my playing with the screws. The derailleur looks awkwardly placed. Here's a photo:



As you can see, its angle is just weird. When I look at a photo of my bike on the seller's website, it looks "normal", like other bikes:



Is it one of the screws that controls it, or is my derailleur bent or something?

EDIT: My bad, it appears to have to do with the gear the bike is set to. It looks normal on the lowest gear. HOWEVER, while I did get the derailleur to move the chain to the highest gear, I can't make it KEEP the chain there. When I pedal, the chain tries to go back to a lower gear (7th gear out of 8). What screw should I play with?

Also, when I play with the b-tension screw, nothing seems to happen as far as I can see.