The ad page shows a ad in the middle of the screen or a Gaz Thomas <3 Kongregate on Kongregate, i assume because it wasn't allowed to advertise there.

A timer at the bottom shows the time spent looking at the ad (or idling) achievements exist for 1 minute, 5 minutes and 60 minutes.

Additionally achievements are available via

clicking free_game link

clicking gaz_thomas link