Oh damn, that's bad. Does it work if you click on the game screen and then try moving with WASD/Arrows? That's the only thing you control other than UI buttons. I do appreciate that you've tried it either way!
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ohhhh sorry i didn't think about VASD at all. It changes everything. At least add it to the game description (it can be done). I like the idea with cards, but in the end the game turns into running away from opponents in a confined space, maybe you can beat it with gravity. By the way, I was able to cheat by flying down beyond the screen boundaries