I'm truly sorry for the unpleasant experience you've had.
The final build of the game is a windowed version with a fixed resolution of 1920x1080, due to packaging limitations it's currently not adjustable. We have subsequently fixed various issues in the game, including window resolution adaptation and the web version, but it was past the submission deadline.
To play the current version, you'll need to adjust your computer's resolution to 1920x1080 or 2k. We apologize again for any inconvenience this may have caused you in playing the game ;-;