It's an impressive game jam scope wise, but regrettably if you find the right pacing with the bow it lacks satisfaction (though as far as the roguelikes I've seen use this asset pack, it was at the top)
-My favorite was the Boss, to have that ontop of everything else, with some nice bow immunity to give you reason to vary up your attacks, was really well done in addition to the other elements of his battle to spice all that up.
I also like that rooms had multiple enemy types that could require you to tackle each in a different way.
-However, If you just use the bow and try and attack any bow enemies that spawn, because they zone in on you perfectly when shooting you can knock down most of their arrows while killing them, and then with your dash you can out-pace the rest until they're dead. It ends up becoming a grind. I only died once after getting the rhythm for it up to and defeating the boss, and honestly I'm really bad at roguelikes as much as I enjoy them.
And having to collect all the coins individually increases that feeling. If at least the treasure chests dropping coins were collected automatically by you it would be nice, but it felt kind of 'well here you go, now collect it all up'. Though I'm sure that wasn't your intention, that's how it felt.
In this case to try and fix the 'flaws' I felt with it, would really just be me pushing my goal for the game on you, because of how much it would fundamentally change what you have. I'll reiterate it's a really strong foundation and the best I've seen with these kinds of asset packs, granted most others have only had 48 hours-not to take away from your accomplishment in just a week with 2 people.
So I hope you have some more time after this game jam to playtest it and find out the direction you may want to take it if you continue further with it based on everyone's feedback.
Something I would suggest that wouldn't affect the games feel, is an icon of your skill popping up and fading over your characters head when it's ready, so it's easier to know when the cooldown has finished. There's not enough visual flare/distinction for it to tell when it's ready purely in the corner of your eye.