Don't feel like the green and yellow combo works - feel like any green that is used needs to be of deeper and/or more muted tone rather than "bright" tones....perhaps deeper and grayer in tone...and rather than bright yellow, I feel like again like a more golden or brown tone might be better.....also not sure about the type style but like this general direction the most of all yours submitted.
like clean line directions of these...but definitely think I want at least two colors in addition to white background as opposed to colorway of entry#40..white might we do with entry#12 to "open up" the graphical element a bit as opposed to blocked in emblem style of mark?