This is an incredible game. The mechanic you came up with creates very dynamic and interesting puzzles that actually feel self-inflicted. Very decision driven and relies heavily on player skill. Flawless use of the theme as well, bravo.
It would be really helpful to be able to move the pieces around that you placed in the current round, or at least have a reset round/undo action button in case you misclick or see something new while setting up your chain.
Seems like if there are 2 chains tied for longest chain it ends up picking the lower numbered chain (IE it would choose 1-2 instead of 5-6.) Potentially it's using a different tie-break method, and I just got unlucky. Also thinking about it, that may be better for strategizing going forward to the next level, but score-wise feels kinda bad in the moment.