I think some additional HUD would be great. Like a cooldown indicator for the dash and a custom cursor for visibility purposes. And i would like the controls, player speed and projectile speed to be a little tighter and faster. I love the Concept and i can imagine it being more fast pace so you run, shoot and dash like a maniac around the level to protect the monster (and yourself).
But still, thats a great submission. Awesome mechanic fitting the theme so well and I love the music!