I really dig the art and the overall style of the game. The movement and everything feels very polished, did not encounter any bugs or anything.
I really wish there was something more you could to with the players, it would have been really useful if you could use the "bond" between them to deal damage or even kill enemies. If they are close together the stronger their bond/chance to defeat an enemy.
I will be playing this game for a little while longer, really would love to beat it on hard.
And as a side thought, this game would totally be something I could imagine being on steam or another storefront.
Nice work.