Thank you for your feedback and your advice. Indeed, the first 3 fights can be pretty rough if you don't get it straight away. That's our bad, we should've been more graceful when people looses fights, more rewards or put some kind of testing ground like you said. We suffered from the Game Designer curse and thought our game was not that difficult ... :(
We won't update the game by fairness of the jam, but it's definitely the first thing will do after !
Thanks again for your kind words, and congrats on your game too! :)