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That's not good. Can you tell me which version were you using?

the web version.
only happened after like level 11 or 12.
screen sudeenly totally blank from a certain point on, no gears or pendulums anymore.
as I flew further to the right, despite the blank everything,, at some point I got the error message

(+1)

Okay, I'm going to fix this in the future. You didn't miss much; It wraps back to level 1 and shows credits. Thank you for playing!