My first thought was that it wouldn't fly at all because of flow separation. After looking at it for awhile, I think it will behave somewhat like a lifting body. You will need a high angle of attack to generate any lift, and lots of power. It may be pretty unstable in pitch around straight and level as the lift goes away. Since it is pretty much flying on the prop, roll stability isn't much of an issue as long as the ailerons will drop easily into the air flow on the bottom of the wing at high alpha. Plan on landing on the tailwheel first with the power at 1/2 throttle. If the tail surfaces are in clean enough air to be effective, it may be kind of 3D-ish

Just my guess.