Game and idea of blood being your ammo is good. But if you could also add more AI instead of having just 3 enemies or resetting would be good.
Use WASD to move around. Movement is relative to the cursor.
Use LEFT CLICK to fire. Hold RIGHT MOUSE BUTTON to collect blood to fill up your weapon, and yes blood is the ammo. :)
Hit SPACE to restart.
PBC - Mac Version 15 MB