well your concept is good
but you shoyld improve:
the graphics
go to colour
increase screen size without using expand button
add more characters try going to budokai tenkaishi 2
also the defult controls should be z to block, x to attack, c to charge ki
a + arrow keys to dash & s to use ki in energy bsll, for player 1, also arrow keys to move
player 2 should be 8,4,5,6 or 5,1,2,3 to move p to block, [ to attack, ] to charge ki, - to dash
& = to use ki in energy ball
still a good game & hope that this game will improve