I would've started at the beginning of the jam. This extra time would've made it possible for me to add battle backgrounds, more playtesting, which would lead to more balanced combats, solve small passage bugs and translation problems...
And I wished I could make the battles more interesting. Adding new powers and giving proper recompense when powerful enemies are defeated. Working better on the Stellar Keys system to add more usable keys.
Well, that was my first complete project. Making it was one of the best experiences of my life. A lot of people actually liked it, so I hope I can do better in future versions. I'm already planning to make a last update for this prototype after the judging period ends.
Congratulations to everyone for making so far! Completing a game is a big challenge.