Let me be clear, PPKP is an AMAZING game. It takes the puzzling strategy of turn based RPGs and amps it up to 11 with thrilling and satisfying beat-em-up combos. However, for an Apple Arcade version, there isn't much to be seen.
The new way for getting gems is instead of breaking out your debit card, you go into a sewer full of monsters and beat them up for gems every so often. The problem? Not only is this the *only addition in the entirety of the game for this version* (save for a few minor UI changes and a save file/backup system), but it's also... slow.
I did some testing, and it takes 32 enemy kills to recharge it (24 for the junkyard), which is nearly 3x the amount of enemies in a stage (12). And the amount of gems you get per run is 15-25, so it would take about 15 stage runs on average (you could just grind the first infinite level for kills, but that's repetitive and boring) to earn 100 gems.
That's the minimum to unlock anything with them, besides one time gem recharges for things like refueling and getting a new junkyard car. 7 stage runs for 100 gems, which would take around 2 hours just to get enough gems for a single cheap unlockable... yikes.
The game itself is great and easily accessible title, but I expected a bit more. 4 stars for me.