Kudos, it is indeed a rendering issue, the GL build runs perfectly. (Looking closesly, I realized the DX build on my machine not only flickers but also stutters)
I saw there's a dll named SharpDX.Direct3D11 so I assumed it's DX11, but it's just a guess, I'm not familiar with it myself....
I played a bit, pretty fun, and pretty hard! (even with Stamperlot!) I can live with not having a map whenever I want but the constant hp drain really makes me want to start up a certain "engine"... then I scroll down and see someone beating the game with all 4 characters with a hand drawn map... seems like I've been spoiled by modern game design... (though I think I'll still use "the engine" eventually...)
Thanks for the GL build again!