I feel like we have technological progress for a reason. The reason for Atari games looking like your game was that they didn't have the tech to do better. You do. Use it.
This resembles bloxorz, a flash game. The heyday of flash games was ten years ago, yet this game shows a regression in quality compared to that time.
The pips don't move accurately. The fact that you can't see the rotation of the cube because of art style and tech makes things harder than they need to be. There's colour involved for some reason (the pips on the ground are yellow while those on the die are black, and that difference is remarked upon by the game.)
What I think you should have done:
- Choose a crisp 3D setting. Something with the visuals of Monument Valley might have worked nicely. Make it somewhat pretty.
- Show the rotation of the cube happening.
- Whatever you do, have the cube rotate properly. This cube did not do that.
Good luck next time!