If Newgrounds Rumble had a child, it would be Rushdown Rivals.
This looks grandiose and spectacular concept. And well executed one.
Now I kinda would want to go full pledging and supporting this and maybe see more content provided? Again if Steam was an option I'd go for supporting devs. Combat, music and artstyle is all blending so well.
Although just a quickie: are the dummies or enemies suppose to be taller than the main characters?