The eyeball was the secret boss, actually! The room where you can access that boss (and then get teleported back to) is about the halfway point. After that, the design gets a little more tricky. The room you were on was all about getting the proper angle on your burst. Of course, the balancing was a little iffy, which I'm going to do my best to refine when I revisit this concept. I'm glad you enjoyed it up until that point, though! Thanks for giving it a play!