Yeah we kind of ran out of time to add a lot more powerUps, since most of the powerUps also affect how the boss is going to be after level 1, so it wasn't just adding a simple powerUp, but also hooking it to how it affected the boss. But if there would be further development on this, I would love to add so many more powerUps (I got loads in my head :D )
Thank you for the review and glad to hear that you liked it!