The game is great. One thing I would mention is the player walking direction. At the end when he picked up the gun and shooting the UFO, I would agree that using mouse pointer as the character facing direction is reasonable. While in the previous two levels, where the character attacks with empty hands and sword, it would be better to use <- -> or AD walking direction as the character facing direction, since at first I expect the mouse click is only for attack, didn't expect for the facing direction, and it would be inconvenient to both control the walking and facing direction with two different inputs in these two levels.