Amazing game! I am glad that it works, most of these types of flash games usually do not work for me.
Here are some things you could imporve:
*Add medals
*Try to somehow reduce lag ( maybe by deleting some decoratios or adding a gap that you can tick if you have a weak PC and it will reduce lag )
* Health and armor ( if they are already introduced in the game and I have skipped them them I am sorry )
Anyways, great job! Keep improving the game! ;)