The presentation of this was really cute, I love the concept and all the SFX, but I must say, mini-golf with a cube is frustrating.
Personally I think enjoyment from golf games is having a consistent and predictable shot: now, the dice roll mechanic lets you see that your shot will be affected, and that doesn't create any issues because the player can anticipate it, but the physics of the cube itself overrides control and diminishes the effectiveness of, well, the effects.
A few comments have suggested using a D20 instead of a D6, and I think that would make this game much more of a joy to play! More sides = more effects + a more consistent shot by the player.
Regardless of my one critique, I'm looking forward to seeing where this goes :)