The art is really cute! I feel like the camera being zoomed in without any indicator on where the orbs spawned made the game immensely more difficult. Also in the instructions, I think rather than having two separate images of the orb in its different states, it would be less confusing to either have one of the images, or an animated image. For a few attempts I thought I was looking for two different things.
I also think the mechanic with the bullets shooting backwards was really cool! But I still don't understand the purpose of the orbs, x)
Game was fun though, great job, <3