Wow. This was extremely cool. Once I understood the charge mechanic it really interested me. I think maybe it would have felt a bit better to use a different button to activate it, but I'm not sure. Overall the placing of the orbs, picking them up to get the combos while charging, and then seeing how it affected your attacks was really satisfying, and I feel like you could go pretty far with this mechanic.
Aside from the super unique mechanic, the music was great. I loved it. The art was also really nice. I think this is just fantastic, and would like more.