Pretty Darn Good
That was excellent. Doubly so as I am a Mortal Kombat fan. I had a few minor issues that held me back from giving a perfect score though.
1. The characters were too chunky. This made it hard to see what was going on sometimes. Put them on a diet for the sequel.
2. The fatalities were weak. The first one, with the fan was ruined by a terrible camera angle and too little blood. The decapitation was good, but spoiled by the fact that he was already dead before the 'Finish Him'. The spike pit was marred by poor sound effects, especially on the uppercut just before. The spikes were also too thick. The last one was spoiled by the characters being too thick.
Sorry for the rant, but I really did like it. Thinner stickmen and better fatalities next time please!
WarKirby