Liu Kang likes to engage in bestiality from time to time and here is a prime example of that. If Kang plays a simple keep away game with a constant mix of high and low fireballs, along with IAF, he is virtually untouchable. Reptile will be left guessing when to slide and when to jump in. If you see a slide coming, of course, block and uppercut. Same thing with any jump-ins. If Reptile manages to go invisible, stick to the plan and keep firing fireballs. Going crazy with flying kicks will likely end up with a block and uppercut.
Reptile needs a prayer and some luck. Go invisible as soon as possible and stay grounded while moving in. Most Kang players will get frazzled and go on a kicking spree offense. Anticipate, block and RH. Roundhousing the opponent will give you more time to go back to invisible, put out a forceball, etc. When invisible, try to work inside and apply a mix of slides, crossovers, etc. Stay in Kang's face, as hard as it will be.
Kang makes Reptile his biotch almost everytime, 9-1.