Tron legacy update 1.2

Im currently watching the movie tron legacy, it's not bad as movies go, but would have been better as a stand alone, not a sequel, but that's not my issue. Their in the grid, a world of bits and bytes, so why do they seem to have real world physics, like the jets using propulsion to fly when the gravity itself is an illusion? I really feel this movie would have been better story and image wise if they remembered everything about the world there in is based on imagination, the way objects move, particles explode realisticly, gravity, enviorment. Even if you say Flynn sought to create an ultra realistic world, his belief in our future being in the grid would have had him make a better form of physics. As in the first fight with renzler/tron, they manipulate gravity or just our perception, but the blood drop moves like fluid dynamics says it would, after CLU takes over wouldn't he alter things to make himself all powerful? Well see maybe this changes as the story progresses. Some great quotes, in the movie, "life has a way of moving you past things like wants and hopes , the only way to win the game is not to play, his patience usually beats out my more aggressive strategy, the art of the selfless- removing oneself from the equation, they manifested like a flame-the conditions were right and they came into being-like flowers in a wasteland-proudly nieve; unimaginably wise, I'd been living in a hall of mirrors, it's amazing how productive doing nothing can be, ... Ok just FYI I'm only at the point in the movie where Flynns son is going to see zeus what will happen tune in soon my friends, don't forget hangover 2, the last Harry potter movie coming up as well as a few surprises, enjoy!