Great concept for a frantic puzzle game!
It felt really good to get into the flow of the game, running to combine dice while planning out my next moves based on the conveyor.
There's a few quality of life changes that I think this game could use, however:
Like other comments said, a way to discard unwanted dice would be good.
I think combining colours should work in all directions, not just with the dyes. For example, combining a red 1 with a yellow 1 should produce an orange 2. This would cut down on the time spent waiting for the right two colours to come by to make the correct dice, and add another layer of depth to the gameplay.
Lastly, a button to swap held dice without combining would be nice.
I think this concept has a lot of potential! I hope you keep working on it after the review period has ended!