After a quick test I can give you some critique:
First it is very nice to see someone approaching developement and that you made a little story come along with it.
There are some major flaws as shooting does not work as intendet and I could not get my character to shoot. That the character was permanently stuck in an animation loop for running to the left was confusing but at least you got the character to do an animation.
Sound actually was neat and the music was kind of enjoyable for a few moments too!
If you did this without any tutorial I am very impressed by your work! Really. I still suggest picking up a few tutorials and walk through them as written to grasp concepts a tad quicker - at least thats how it works for me.
I hope to see more from you in the future and as Senator Palpatine said:
"We will watch your career with great interest" :) Uh but don't slaughter any younglings, okay? :)
Stay crunchy.