[tetha]

The game is very much a deckbuilder like dominion or slay the spire, and the slot machine is just fluff, except maybe adding a two dimensional aspect to it.

The main appeal is: You accumulate symbols into your deck, and the slotmachine arranges a random selection of your symbols up to 20ish (don't recall 100%) onto a 4x5 grid. Afterwards, symbols interact with symbols, combos happen and it just becomes funny to make a couple hundred thousand gold in a single spin. This is very similar to the fun of having an engine go off in dominion.

And then that appeal changes as you realize that there is very little luck necessary in the game. If you try hard, you can get win streaks at highest ascension levels. If you learn the different combos beyond the obvious ones, the weird interactions you can have with items and essences and so on.

It takes some 3-4 runs to appreciate the depth the game actually has. And then the fun begins.