Great Game! BUT?!?!?

Ive played pc Slingo years ago & recently began playing the Lite, then paid for Supreme & now its offering to purchase Slingo Supreme 2 directly from the game app screen. Problem is - it wants to do an instant purchase & I have no idea how much version 2 is and there is no listing for Slingo Supreme 2 at the App Store. How much is it??? And is it really worth the additional expense?

OzarkButterfly about Slingo Supreme