While it was a very early arcade-style game, and thus had a relatively simple premise, Lunar Lander at the time was pretty challenging and interesting. Taking the core gameplay from that classic, where the challenge is using your thrusters to counter the effects of gravity to navigate and land your capsule, Terra Lander then tries to throw in some added elements to make it a bit more appropriate for modern gamers. Enemy guns and some tricky landscapes, as well as a need to make efficient use of your fuel, are what will continue to add some challenge to things but there’s no getting around the general repetition that will set in pretty quickly with this simple premise.