My initial impression of the game was that it was a turn-based card game, but in the end it felt more like an RPG (as I was tryinig to work out the true ending xD). The storyline is definitely creative, and I really admire the art and music!
If there were a small in-game tooltip (like a car stats in mario kart) or hint about items (stickers to put on the dice), the player may get more hint about game's rules!