Thanks for the feedback, totally hear you that the controls feel chaotic at first.
In case you end up trying again... One trick I've found helps quite a bit is to keep my mouse close to the character. In fact, if you keep it directly below the character and use it mostly for upward movement (downward shootnig), you can then use A & D for your left/right movement and the controls start to feel really good. The chaotic nature of the controls was something we intentionally chose, but have found that with more playtesting movement actually becomes pretty stable pretty quickly.