Love the game. It is a GRIND, but imo that captures the soul of Digimon games perfectly, there's always a payoff for the loads of work involved to raise a cool team.
Some suggestions I have though:
Species XP requirements get a little absurd, it'd be nice if there was a way to convert data from Digimon we don't want into the Pastille items that boost the corresponding XP type. Because right now gathering extra data is a bit pointless once you find a Digi with decent stats.
Also I've noticed I've lost quite a few of fights against wild Digimon because even though our levels were close, their stats were completely out of my league. It'd be nice if there was a way to determine a wild Digi's strength based on stat totals instead of just levels. And having a different indicator for their strength relative to your active Digi would make battles make a lot more sense, like changing the color of the scope around the Digimon (red for much stronger, green for weaker, etc.) like in some of the Digimon MMOs.
And a small one would just be so we can just tap to feed our Digimon instead of dragging, it can be a bit wonky.
All in all I think it's a great game! 10/10 for a fan project so far. Almost indistinguishable from an official Digimon game (for all their good and bad points). I'm excited to see what updates bring.