Thank you for your feedback! We have noticed a sudden spike in difficulty when it comes to the boss fight as you experienced, we will be working on that on our next patch as well as making the other enemies more challenging.
We've also noticed that most players don't realize that using the special power-up consumes health and we will make it more obvious on our next installment. We hope you enjoyed the test and keep an eye out for our updates!
-The Chroma Goggles Team.