Thanks a lot for your comment. It was very intentional indeed. Funny, I have played Portal 2 weeks ago.
My idea behind it was the following: we always associate dice with randomness with which we let a game decide the outcome for us as we dont want full control to keep things fun. In real life some decisions are so difficult it feel like it would be easier if I could just roll a die and follow the outcome. That's what I wanted to incorporate into the game.