I think you shouldd work harder on your next game, Don't let this one lets you down. And ignore all the haters, people should be more positive and helpful. Here are some advice i suggest:
-A more detailed background. I didn't actually knew if i was moving or if the bear was moving
-Maybe work your own gun and bullets desing?
-Work on the wings of the helicopter, yeah no, I didn't knew if i was lagging or if it was moving slow
-Maybe a little story?
But anyway keep working, good luck :P