Hi, nice font! The biggest issue with your fonts is that they are small compared to their EM size (1000).
You can simply magnify them with Edit-->Select --> Glyphs Worth Ouputting, then Element-->Transformations-->Transform-->Scale Uniformely... and apply a factor of 175%.
This will change your left side and right bearing values so I would set them back arbitrarly to 6 (or whatever you like in Metrics-->Set Both Bearings...). You will also need to adjust the kerning after that.