I played to maximize the number on my first run. I think this is the most fun way to play and should be encouraged! I wasn’t sure how high I could let the weight difference be before I lost, which was kinda scary. The red background warning works, but I wonder if it could/should be clearer. My initial impression was that I had to play the merging game equally well (or poorly) on both sides, and I think that would be fun!
I noticed that on loss, the game displayed my turn count. On my second run, maximising that was interesting, though mostly involved dumping pieces off the edge of the board. This lets you get an arbitrarily high turn count. I stopped at 333.
Would be more interesting to drop higher weight pieces the further you go? At some point, the entire top of the board(s) becomes tier N, and you can’t intentionally stack higher without pieces slipping out since they don’t combine.
Another thing I noticed was that the piece that was just dropped was kept while the existing piece was deleted. This causes more chaos, but also without walls, pieces slip out and your weight/“score” decreases. You aren’t able to play the merging game anymore.