This game desperately needs instructions. And I mean English instructions.
All I found out was the arrow keys to move, and s makes the word salvo appear, whatever that means.
When touching the gun it says mission 1 complete, and when I touched the cop car it said mission 3 complete, how am I supposed to know what those missions are? How do I shoot the gun? Can I drive the cars somehow? Why did a message suddenly appear over the game? Do the save and load buttons work?
Try reuploading the game when it's finished, maybe let someone else who knows nothing about the game playtest it first.