4 stages are lame... it must've been 9 stages, like in T5:DR!
Yeah.. there is an arcade mode, that it looks like the real arcade... But i never tried the Arcade Mode myself.. I played always on Ghost Battle, because you get more gold in Ghost Battle rather than in Arcade Mode.. you become in Arcade Mode after beating an AI player only 2.500 gold, but in Ghost Battle, it depents on how high the rank from the AI is, how much time you left, how much health you left and all this.