Thank you so much!
Yes, unfortunately, there just wasn't enough time left for proper balancing tests. Also, because it's my first jam, I got the scope wrong; it takes too long to progress, and including a multi-slot save game system was complete overkill! :D (That would make more sense for a full game, like when two people want to play on the same PC more than just once).
I will definitely take this experience with me into my next jams! :)