Yoo man, nice gameplay loop, i had an idea like this but couldnt do it, well done
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Initially I had issues implementing the loopback mechanic whilst still running on browser well. I started with larger puzzles that would take more clones to solve, but it took too much memory to store the player's position every frame. The first solution was to only store it every other frame. This caused issues with the clones getting stuck on walls that the player didn't, so I had to decrease the number of clones to 3 and decrease the maximum timer to 3 minutes. I think this caused the puzzle designs to become less repetitive and decreased the punishment for messing up one of the clones movement.