Two things: I like that engines run off energy when fuel is depleted, but the engines have to be switched off to allow the energy to recharge if you run out of that as well. Also, shields should recharge off of energy IMO - don't know if this is intentional that they don't, or you just haven't gotten to it yet. Either way, surprisingly immersive game. I like :)
@coldbloodXII: I've noticed that the shields spawn a split second after you do, so if there's lag when you respawn, you're temporarily vulnerable. THIS NEEDS FIXING.