Space Hell

This is my first game, so any criticism is welcome. In this game, you play as a space Clint Eastwood, where you shoot your way out of your problems. 

The left mouse button is your best friend.

The two sliders on top represent rotation speed of your space gun and the fire rate.

The top one controls fire rate and the bottom one controls rotation speed. This feature adds replay ability to the game for players to try out new combinations.

Hopefully, you all will enjoy and have some constructive pointers for me :) 

Note: Don't shoot the hearts, let them come to you.