TI-57 Lunar Lander ?

[EdS2]

Hmm, if you can land successfully with a single last-minute burn, you've got a terribly over-powered engine, or equivalently the time step is too coarse. This game needs tuning!

And if you can land gently with a constant thrust all the way, you've got far too much fuel to start with!

Does the game model the decreasing remaining mass of the craft? That's a crucial part of the rocket equation. Otherwise your chemical fuel contains an unrealistic amount of energy.