Skipping the economy
Players pour bots into force and forget income. The wave that breaks them was a money problem they made themselves by ignoring the town.
The character database shows the cast, and the boss database shows the fights that punish a thin economy with a swift end.
One deck for all
Forcing a single Quest deck on every hero wastes their edge. Match the deck to the role each hero plays, and the board clears in far fewer turns.
Rushing waves
Build defends on a timer. Rush the edge without walls and the wave walks through your line and ends the run before the upgrade you wanted lands.
Ignoring the cast
The characters page shows who fits where. Guessing wastes a run you could have planned around the right bot for the right job at the right time.
Hoarding the wrong mat
Stockpiling one resource while another starves is a quiet killer. Spread the gather so every system has what it needs when the wave arrives.