Base gameplay is great--
"Borrowed" graphics are okay.
No sound effects :/
No points
No power ups
Background could use more details
As a moderate Dr.Who fan, I don't think I've seen the Docter go around and shoot stuff. He does cause mass things to get shot or blown up as an effect related to his plans, and "yes" has aimed his sonic screw driver many times at enemies, but he would never take his Tardis and use it to shoot things from my understanding of cannon. I suggest for story, that we are shown it's not the Doctor, but someone like the Master (or Mistress) piloting.