Thanks for playing and the kind words. The gummy bear was originally just invincibility and when adding effects and sounds to make the power ups feel better our teammate made you grow big. Then he had the idea of making you able to stop enemies. He had unknowingly combined invincibility with another power up idea but it was better the way he did it. There wasn't anything that really explains what the power ups do and I agree the gummy bear isn't the most obvious. All the others have more immediate and obvious outcomes.
I also like making a wall of death with all the upgrades. I really want to solve the getting stuck in your attacks. It was a tough problem I tried a few things to solve but nothing really worked well enough to keep.