Thank you for playing and for your valuable feedback. I completely agree with you, in a Game Jam where players need to try many games to rate them fairly, long playtimes might not be ideal.
As a temporary solution, I recommend using the cheat menu I used for balancing. During the setup phase, you can press Ctrl + Alt + C to open it. From there, you can add as much Gold or Mana as you need.
Thank you for your time!