great game, love it, tht its slightly hard, but after 4 tries, manage to beat pass level 50, but die at level 50+ ... wahahaa
just to share colum1to6 (frm left to right)
put 1&2 blue towers for max energy usage (slow, firestorm, even blocks)
3&4 red towers, slowly replace by purple
5 green (keep repairing, esp the centre)
6 green if possible (left 1 3x3 for blocks & recycle them to get Metal for repair)
and i mean 3x3 of the same color to max damage & protection
kep a look out for witches that fly pass / thier bombs that can hit your behind towers. use firestorm wisely
basically its help me to get pass lvl 50
hope its helps
great game, look forward to a seq. but slightly easier (mayb10-15%, as i have to play 4times to work this idea out) will be even better