F4 to switch between windowed fullscreen.
com en-us windows forum games_windows_10 windows-10-and-dirextx-90c b116744d-73da-41e6-97ba-031212bf2606?auth=1. Upon beating the last room in each level, the next world unlocks.Includes five polarity based worlds (ten levels each) plus a tutorial. Redefine the controls in the windowed mode (menu "Settings").