Hmm, the game was meant for screen sizes of 16:9, and we hadn't tested other screen ratios. For the blue screen, there are a few settings that we can change in Unity for the web browser to test if that would fix it. However, we won't be able to update the game during the rating period.
If you haven't already tried it, see if the game runs on other browsers. Plus you could even download the Windows version which should have fewer issues than the web version. But you're not obligated to either. Other than that, I have no other solutions. Apologies for the inconvenience and thank you for trying. I hope you have fun enjoying the rest of the game jam games.