Name ideas:
Cubestorm: Capsule Hero
Capsule Survivors: CubeStorm
A few other thoughts.
1. This is actually fun, I the the multiple enemies with slow turning really contributes to this (rewarding careful positioning).
2. I didn't like not being able to dash while attacking.
3. It would be great to have like a spin attack or a dash while jabbing attack.
4. Everything always feel so incomplete without any sound. Add a small amount of music and fx and this will feel 10 times as complete.
Good job!