This game needs Invincibility frames when the character gets hit and could do with a lot more weapons/contacts along with a few sprites for existing weapons, but this is really good! You got all the basics down for a Vampire Survivors- like
Or:
Have each 'species' set have a specific 'pushback' as a selectable option if they get all three versions of a specific upgrade.
Human: Fires off a full circular round of bullets for x number of seconds.
Slime: Absorbs x number of enemies to restore health.
Gnoll: Show a circular sphere of claws around the character for several seconds.
Kitsune: Send out a ring of fire/energy that spans outwards within an area.
This could even be a togglable prompt with a cooldown.