Game runs very slowly for me. Maybe it's some vsync shenanigan, but don't tie your gameplay to the framerate.
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What's the refresh rate on your monitor? The gameplay isn't actually tied to the framerate (vsync is enabled and the graphics will draw at your monitor's framerate), but the update loop is at a fixed 16ms phystick and I don't interpolate between frames. As such, you will only see a difference between frames at 60fps, but the screen IS being drawn at vsync. I may support higher refresh rate monitors later, but I have no way to test them since I have a 60hz monitor. I can interpolate between frames, perhaps, but I really don't want to have to code the tediousness of a time delta