Whoa. That got unexpectedly trippy real fast! Made me laugh. And the cool fish eye/distortion effect made me blink, so mission accomplished!
The randomness of the control changes are a bit frustrating. It would be nice if they came as a result of something else. Like maybe you have to make a trade-off--if you take this key, it'll reverse your controls; if you take this pack of extra arrows, you're going to get this (maybe less intense) image distortion.