From the GDD, it looks like you got a multiplayer testing build working during the jam. That's really cool!
Instructions/tutorial are dumped on the player too fast, I had to consult the GDD to remember what the rules of the game were. I get that it's a game prototype, so a full tutorial is probably too much to ask at this point, but maybe just have a button the player can click at any time to see the rules of the game instead of having npcs say it once and then the player just has to remember?
There are a lot of grammatical errors, which is understandable because from the GDD, it looks like Portugese is your first language and English is your second language, right? There are a few spelling errors too though, you could easily fix those just by putting your game's script in Word/Google Docs and looking at what the spell checker says is wrong.
The player on the dungeon area feels sluggish, I want it to move faster.
I like the mechanic of being able to "overspend" mana, it's cool but seems tricky to implement from a game balance perspective, I hope you can make it work!
Lastly, I don't see a credits page, but you mention you did this with a team; give them credit on the game's page!