Probably a bit confusing to play right now, I removed a level that was bugged, but that level also introduced a key mechanic so it may be difficult to understand the last puzzle (level 3). I'll fix it soon and have a separate download link.

press r to restart a level

the blue circles on edges are clones. When you return to the start node while carrying a clone, it restarts the cycle. You must exit with all of the clones you collected.