Game Description & Manual: Use the A and D keys to move left and right. Left click the mouse to shoot blood blasts. Click and hold the left mouse button to shoot a blood geyser. Blood geysers drain your blood supply quickly.
The maim objective in carious weltling is to basically stay alive. With your blood bar slowly draining you are on a constant mission to eat as many falling grubs as you can while avoiding and destroying falling debris and predators.