I kinda like this concept.
Flower build seems overwhelmingly strong because of all the synergies.
I wonder if this could expand to a more complex ruleset with wider synergies to enable different builds or even rules like pushing/transforming other pieces etc. This could also spawn its own genre after some cosmetic changes, think idle city builder cellular automata.
I like the round goal scaling off the current gold as it keeps it balanced, but losing by only 6 gold feels like shit. Could there be a way to do partial losses, like an option to sell tokens or gain negative ones to make up for the missing coins?