Things I liked:
I thought the voice clips were very cool additions to the game and your game definitely had a lot of very good "feel" to it. Mining felt fun to do, and gave good block feedback when hit. There was not a moment in your game where I wasn't immensely amused by everything going on.
Things that could be better: Your box colliders could use a bit more work, I found myself falling into the cracks quite a few times. In addition, you should consider having the controls be displayed on the main screen as well. As soon as I left the menu, if I wanted to go back to the start I would need to restart the whole game.
Overall I got to say I was pleasantly amused as soon as the game started and I greatly enjoyed the experience. For the first game I have played this jam this is off to a great start!