Honestly, love the concept. It definitely needs fleshing out. Most prevalent idea comes with items. I like the simplicity of it but I feel adding some items would at least allow for multiple runs to get the best rolls or the best items.
Of course, do what you want. If the price is right as it is now i'll buy it. If there's more added down the line i'd be more likely to be happier to drop a larger amount on it
But definitely something to be proud of, easy hour lost in the game