Dear Alexfoo,
I know I'm a little late to be typing this, and that it has been awhile since you published this game, but I think you should make this game into levels, and every level has the doors open up to somewhere new.
Also, I think you should make it first person, since trying to control the character and the camera simultaneously is kind of obnoxious.
Anyways, that'd be my two cents, and I would also like if there is anybody willing to sub me on YouTube (WreckinPoints11).