It was full of little fixer uppers................
you need to work on some things like...
1. Play Button
2. Loading Thingy (*LOL*)
3. Security Guards gun is upside down...
4. When he dogdes thingy (whatever it is) at start you see a little white thing cut into his head
5. His smile at the start after first kill doesnt stay on his face. He Walks away and it floats there...
6. When boss grows and opens his mouth he has no teeth but then they start appearing they should appear all at once when he opens up mouth...
Keep working at it. Im sure that if you try hard you can make something out of this !