Thanks so much for playing! Yeah there are some major balancing adjustments I plan to make once I can update the game. Haha. Flash sale has a problem with another coupon as well, so the newer version of flash sale only reduces a random category instead. Which would mean using 4 would require much more luck to get a full board wipe.
Thanks again for playing!! I plan to release the next balance / post-jam update as soon as the judging period for the jam is complete! :)