Ah this is a great game. You really should make more maps. The time reversal concept is very fun. I died a few times by the boulders to understand how to escape. Is undo and redo related to debugging or is it supposed to be a core mechanic? It would be an interesting idea if it were related to core mechanics, it would make puzzles even more thought provoking if it had some strange time effect.
When I hit the L button, I get
==> Encountered unhandled error: Unable to load foreign library (GLIB). Error opening shared object "/tmp/chrono-labyrinth/bin/libglib-2.0.so.0.7200.4": libpcre.so.3: cannot open shared object file: No such file or directory. ==> Running quit hooks.
I don't know if this is related to your hotfix.