PowerPoint/Keynote Design Project - Aspects

This is what a business in United States was looking for in their PowerPoint design

I need a fairly straightforward design for a presentation I currently use in Keynote. It is very basic, as I developed it in an Excel spreadsheet and a friend helped migrate it over to Keynote.

I don't want it to be overly complex and I don't want it to be too busy. It should not contain too many distracting elements, but I think it needs some professional design changes to make it more appealing to the eye. I think colors should be soft and not flashy; transitions should be simple.
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In response to several questions received, I have added two files. One file is the actual presentation I currently use. I run it in Keynote but I uploaded it in Powerpoint. As you can see, it is a single page but it is developed sequentially.

The other file (Examples) is just a random selection of slides I chose from several unrelated presentations I use. I am providing this to illustrate the range of colors, type styles, and combi… Read more