why not make minions after you beat the game to add replay value and make them very expensive so there is something to work towards. for instance the electric minion get multiple beams or chain lightning effect. after i beat the game i didnt see much point for endless mode
i dont have enough time to eat sleep work and play this with the lousy 2X speed needs at least 5x at 2x there is more waiting than actual playing and as great as the game is it snot worth it. add 5x or 10 x and i rate 5 out of 5