Yeah... im pro at MAKING cheats for myself heres YOUR guide:
1: Set difficulty to max
2: start the first level, and KILL all 10 of the thingies, with missing ONE beam max.
3: after the round u should get 50k, and then click BACK, and then FOWARD, BACK, FOWARDS ect. after 16 times of doing so... u get 800k, and u can pick ANY character, and let the clothes fly!
Have fun cheating