I don't get it. I only have time to kill one enemy and then my HP just disappear and I die. I don't actually understand why. Also I don't understand what "Space" do.
And it's funny but I spend around 5 minutes to understand where is Start Button :D
Right, You take damage if you get too close to the white dwarf that might be why you were dying.
and I thought the start button would be obvious. Thanks for the suggestion man!