Really odd. For most people it just works fine.
Can you provide a screenshot or / and the log file? You can find the log file at the folder where your .exe file is located (where you downloaded it or with the itch app: rightclick my game, then "show local data"). There is a folder "SealBreaker_Data" and inside of that is the log file called "output_log.txt".
That would be a huge help! Thank you :)