Okay, works on my Windows 10, but on Ubuntu, it first can't detect the EXE because that install doesn't have the EXE extension, but renaming it the Executable to have EXE makes it work good.
Also can't select a Hero in Ubuntu, can't see stats, can't see ???-s and going Back doesn't bring being me back all the way, but just moves left and up without menus.
Also, in both versions, mousing over the upper right on the Hero Selection screen and clicking makes unexpected sounds?
Would've posted this on the Steam forums if you make a dedicated Bug thread.