Not much to leave feedback on, but i will do my best. I know it's hard to find a team for voluntary events like this one, and sometimes even if people want to participate, life has other plans. So don't be too harsh on yourselves, it's the attitude that carries on and makes you persevere. Not only you've learned something new this game jam, but you will apply these learnings in the future.
What you've done well: control system and pacing of the player character.
The screen separation when initiating the other world is done quite well, with the small map on the bottom right showing where your current location is.
What could have been done without a complete game:
Put gameplay instructions.