Some thoughts from the developer:
I thought this game turned out quite well for the short amount of time we had to develop it. The art is fantastic, and this is the first game jam I've done with a dedicated artist working on it for the entire jam. I think this idea was very good, though maybe a little too large for the two days we had to create it. The main issue I feel the game has is a lack of clarity. It's not really clear in the battle what exactly each dice does, and the shadow dice are too far away from your partner to be clear that they apply to them. A lot of the clarity issues would likely be solved with more time spent, but unfortunately that got pushed aside in order to finish the main mechanics of the game. We also would have added some more polish and sound effects with more time, but I think we got enough in for it to feel alright for a game jam game.
Initially we tried to make it so the dice split between you and your enemies (which is why the shadow's dice roll on the right side), which was neat but resulted in a less-than-ideal gameplay loop. The clear strategy was "give big numbers to you and small numbers to your enemies". This possibly could have been improved with clever game design, and I think there is still an interesting concept there, but we felt it worked better having to split dice between allies in order to play to each character's strength and weigh risks of giving one character poor dice.
Ultimately, I'm very proud of the game we came up with and the work we finished on it. I believe the core concept of this game, and a "dicebuilder" rogue-like game in general, is very strong and hope to keep exploring this idea in the future. Thanks for checking this out, and I hope you enjoyed the game!