Nothing new or original.
It looks nice, but I've seen other games that look exactly the same.
Not only do the graphics look borrowed, it doesn't look like you did anything original here.
There is a glitch that gives your gun permanent infinite ammo. For instance, if you Rage with the Minigun, you get infinite Minigun ammo for the rest of the game.
I thought it was odd that a random boss was thrown at me early in the game. There should be a boss every five or ten levels to keep things interesting, otherwise this game is just a bunch of grinding to get to the end, with no real strategy involved.
I had about $200k that I couldn't do anything with at the end, because I had everything upgraded. Work on the money system.
If you're going to copy a specific game type (like this top-down 360 degree shooter) then you've got to beef it up with a lot of originality. Rage mode and weapon upgrades is a good start, but you need more.