I've released a new game that's sort of a "sequel" to Powered Descent, and unsurprisingly it's called "Powered Descent 2".It's very similar to the first game, but has refined controls and is running on Unity engine. Some of the missions are based on historical space landings and some take place in the future.
Currently it only has 10 levels at Moon and 10 at Mars, but I'll be making more if there's demand. :)
Download here: Play.google.com