Thank you for playing, and the helpful comments!
In response to your suggestions:
1. Yes, absolutely. We have quite a bit to do in regards to player/enemy feedback, showing player health, etc.
2. Agreed!
3. This is a good one. As we move forward with design, the gameplay "feel" and pacing will be a critical element to help this project find its legs. Or treads as it were....
4. Also agreed. Probably wheel up/down to cycle weapons, middle click to open weapon ring.