Overall, I enjoyed the game, but it doesn't feel the most engaging.
It seems the only way to interact with the game is to press the spin button, choose a slice and then place it. The battles don't actually ask much of the player. It may be more fun if there were other options that change how you play as a reaction to things that happen in the fight.
I wish there was a way to see what my slices did while choosing which to replace.
I also ran into an issue with the stats UI getting cut off when playing fullscreen in browser, but not when not in fullscreen.
I've just noticed that I can hover over key words in slice descriptions to see what they do! That's neat! You may want to colour those in so that they are more noticeable.
Other than that, the game seems very polished. Its good to see one that has music and sound effects on top of good art too.