You didn't say what your intentions are....do you want the level to indicate while the plane is sitting statically on the ground or to provide you with information in the air? With the plane sitting still and with the level calibrated, it would work like any level. With the plane in motion, you would drive yourself crazy trying to figure out what the level would be telling you.
Without going into too much detail, the bubble in the level is a gas and lighter than the surrounding fluid unlike the ball in the turn coordinator vial, which is heavier than the fluid. That's the reason the level vial is formed or ground so it's convex upward. The gas bubble migrates to the high point in the vial center. The inclinometer is curved opposite, concave upward, so the ball centers in the low point, all things being equal by proper rudder inputs. In a slip or a skid, the inclinometer fluid goes to the "light" side of the vial and the ball goes to the "heavy" side. Under the same conditions, the gase bubble in the level vial is going to move in the opposite direction.
For kicks, buy yourself on of those helium birthday balloons and tie the string to the seat belt in the right seat of your car so that it's tethered but still floating free. Drive down the road, make a turn, and watch which direction the balloon moves as the heavier air inside the car moves toward the outside of the turn.
Of course, you could always install the level and then develop your own mnemonic like "step on the fluid", set your OBS to the reciprocal of the heading you're flying, and be a real flying maverick.