Game-breaking bugs
I read about the issues in Chrome, so I decided to try this game in IE.
I was lucky if the game ever acknowledged what keys I was pressing. Press left and I would be stuck on the left side of the screen, press up and I would magically go down to the bottom, press A once and the ship would only shoot left until I died. Pick up a power-up and immediately have speed upgraded, even if hadn't touched the S-key once. I tried, I tried so hard, but for me, it's just broken.