Oh no! I heard some people have the same issue. They managed to get it working by switching to Chrome or playing in incognito mode. I hope I can figure out what causes this issue. Please let me know if you still can't play. Do you by chance use a keyboard with a different layout?
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I think that could definitely be the reason. If you have a gamepad available, preferably an xbox controller, maybe that can work for you? If not, I will definitely figure out a solution for this. It really sucks that I may have alienated a demographic of players because of an input issue. But I'm glad that you are able to help me narrow down what the issue might be!