Thank you so much for your comment!
Actually participating in the jam really pumps up the skills a lot. We're really happy with the feedback because it really clearly points out the points where mistakes were made.
I'm not sure if it's acceptable to change the game content during the jam, but we will release an update after we finish that will fix some bugs and make it easier to understand the game rules. Hopefully there are players who will want to come back to the game after it is finalized :)