Yeah, I should have had a message explaining that the die doesn’t go up to 6. To push the 3 into the pit, you just need to use the take/give pip mechanic to rearrange the faces you do have. If I had more time to work on it (I know, the story of all the games at the jam) I’d have had more puzzles where you do eventually go all the way up to 6.
Thanks for checking it out!