I know you're aware of a lot that you could add, but what you do have isn't bad. Some better ai could help the game a lot. Currently all the beans collect together, but if they avoided each other while following you, that would help add a challenge in the game. Also, the game is currently using nearly 40% of my gpu which is a lot for the small amount going on. And lastly, putting the game in fullscreen causes it to crash, but no big deal.
The visuals look great and I even noticed my player's reflections in the cube which is a nice detail. Nice work for one week, would love to see what two weeks would do for this.