My son just started playing this game (purchased used at GameStop) and really enjoys it now. However, after playing the first few levels, he began having trouble with the 3rd or 4th. He then went back to play a previous level and somehow had infinite ammo (showing the infinity symbol). He was also able to constantly run very fast. Another interesting thing that he found was that he could not go past 10k in energy. I was watching him play and neither he nor I can figure out what he did to make this work. It will be interesting to see if it happens again when he plays the next time.

Best to You,

Diffie