Thanks for the feedback on this build :)
1. Changing bullet directions were added to mix it up a bit, and catch the occasional player off-guard. However, I will reduce the wind-up time before changing so that it becomes apparent when you see it for the first time. In v0.2, different bullet patterns will have different colors, so you can differentiate between them (colors are randomly picked from a set of hues based on level style). Homing attacks have been toned down, so they no longer chase the player down like dogs :) they still exist though!
2. Due to popular opinion, I decreased the normal movement speed by a bit and increased the slowed-down speed by a little. I'm not sure if it's the right choice, but we'll see how others fare with it :)
3. Ah yes, the arms! It is still a buggy feature, and I regretted putting it out there before fixing it. I think I might release v0.2 today, to temporarily fix the arm problem. However, v0.2 has some difficulty issues (it is much more subdued, and easy, but has some interesting patterns).