After playing for a solid 30 minutes, I can safely conclude that this game is not "nothing". In fact, there is a lot of really cool stuff happening here, especially considering that this is your first completed project. This is a really stellar accomplishment keeping that in mind. Working progression system, both 3D and 2D environments with functioning controls. I am honestly very excited to see where your game dev journey takes you if this is your first complete project :O
The notes I would give:
- Progression feels a tad slow
- Controls are only introduced after you use them to speak to the first NPC, worthwhile to consider teaching the player the interact key in a different fashion
- Collisions with platforms are a bit clunky and could use some ironing out; try allowing the player a grace period with jumping off the edge of platforms and making collisions a tad less harsh perhaps
Overall very VERY solid first-ever game jam entry. Can't wait to see what you do with it!