This was a fun submission! I loved the shadow effect you had in the game world. I am not sure what the squares were, or why they were trying to attack me, but I enjoyed fending them off. Your sounds were really well done in this game too as well as the menu and level selection had a great style to them!
Only think I found difficult was the actual act of shooting the squares. I couldn't determine what the hit box was and found a lot of my bullets going right through the squares without doing damage. However, it still was a fun game to play. Great job!