Unfortunately right after starting the game I have red rectangle from the left moving much faster than I. It just deletes me and restarts the level indefinetely. Probably some performance magic. I run it in Chrome.
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Yep! Now it works!
I think the timer is to strict though. You can leave a room for at least 1 small error. Now you should play each level perfectly to beat it.
Also I think you need to pause game in the beginning of the level and start it only when button is pressed - now you need to hold arrow button before level is loaded to reach finish in time.