Good start however I think the grunge look is only something that would be used on shirts, etc. For the actual logo (wordmark) it would need to be more simplistic (remove the green). Are you able to do this and also add in a symbol (some form of unique M or abstract symbol)?
I really like entry #27 thank you. Can you just play around with some of the symbol concepts for the M now or even something completely different (an abstract symbol)