Test your game
Your game shows no signs of a game that has actually been playtested.
Your gun shoots on click instead of mouse down like it should
RIght away you get surrounded by enemies, and by the time that you can move out of the starting area, you've already killed half of them.
Once you've killed all the enemies, you're done. and there's nothing left to do but wander around.
There's this coin that keeps following you that you can't pick up
Coins seem to have no use.
There's no reward for the player at the end.
This was not a game that was ready to be submitted