Renovating the Floor of My Lanai (Covered Patio)?

I need help on my lanai (covered Patio). I have removed all the ugly paint from the floor, but do not know what would be best to add. I had considered the "make it yourself" pavers, just repainting, or using outside carpet (but it gets moldy). I found some recycled rubber, the ones used on garage floors.

The problem is, when it rains, I have standing water. I have also considered putting down tile. All of these options are very expensive, since this is a large area. The present floor is chipped and uneven. Could I add more concrete? Any help would be appreciated.

Karen from Venice, FL