Ha, the performance could be a bit of both - caused by low fps, but the grid shifting once a second was intentional, at least. If I do a 3D web-game next year, I'll have to either get that sorted, or also include a download just in case. I've also heard a few times it's hard to see what's next (especially in the middle column) so I'll play with the camera a bit. But thank you for trying my game anyways!