I liked this game a lot! The graphics with the filters are so coo. The invisible walls aspect is a little hard to see because the screen is zoomed out so and the character is small, but I understand the intent. I had two music tracks playing at the same time while playing on the WEBGL version, so that's probably a bug or something there, because the cacophony was driving me crazy. The enemies I feel were way too aggressive for my reaction time, so maybe I just was not that good at shooting lol. That being said, great game!