Nice work on the art this week :) I liked propeller-doggo!
I liked the various abilities, though I felt like the ghost one was probably the strongest. The barrier could have been slightly taller -- as is, the fire projectiles can actually go over the shield and hit your hat, damaging you.
The background parallax was cool, but in an indoor environment like that it makes it feel like the bookcases/window are pretty far away, and then you've got the background girls climbing the ladder and they're roughly the same size as the foreground girls.
I felt like the first level had a bit too much time between pickups, and some of the fire attacks lit things on fire too quickly to react to. I much preferred the second level, which was much faster paced but had less potential to suddenly damage me.