Shadow of Mordor on PC

So I recently upgraded my system to Core i7 with 8 GB RAM & GeForce GTX 750 ti. Shadow of Mordor plays on normal settings by default. I haven't yet changed any settings. The game is good but gets repetitive. It also gets annoying when a captain you just killed by not decapitating comes back from the dead. I have killed some captains but unfortunately haven't  been able to unlock "red" abilities. I even moved ahead in the story but the gold/yellow abilities are still locked. The combat is very interesting. It's like Batman series but more forgiving. Most of the times my ground executions get interrupted. I wish this game had something more, like interior, houses, etc.