With the controls, a little less acceleration on the ball would be nice. Also, make sure that you don't have one square on one side and then another on the complete opposite side (as far away as the game can do) where you can't even get it with a superjump.
I'm not going to bother rating this right now...
Once you get the lasers the game plays itself, just put three on each floor as soon as you can (save money for the extra shafts, of course) and upgrade as you see fit, it's basically a guaranteed win after day 8 or so...