I'm not too sure what the desired end result should look like here. Can you provide more details or maybe a mockup sample of what the end result should be?
Although, after looking at the workbook, I think that the first step will need to be pivoting your data. Having a separate column for each month isn't the most ideal structure for analyzing within Tableau. So instead of this data structure:
Project Name Jan Feb March April May June Glovia G2 Green Green Green Green Red Yellow
You'll want something structured like this:
Project Name Month KPI Glovia G2 Jan Green Glovia G2 Feb Green Glovia G2 March Green Glovia G2 April Green Glovia G2 May Red Glovia G2 June Yellow
Hope that helps get you started