I'd just add all features to make game more tolerable to player - as lifebar, for instance. Remember how Sonic 3D made isometric jumping easy?

It certainly does. And I think it would make an entertaining game. Although isometric jumps are hard, as Snake, Rattle 'n Roll demonstrated :)

Thanks for the comment! I like this picture too, even it is not canonic ISO (front edges on blocks are drawn different). The main idea was to make nice looking isometric picture. I watched original Star Wars trilogy at that time so it given me theme (but I draw spaceships pretty often as you can judge even by my PJ gallery, so SW was booster). My interest in iso at that time was also boosted by playing Zaxxon which has great graphic style. Actually I imagine Astra as a game - you appear in the large spaceship at the bottom and then control probe with antenna/aerial which turns, jumps etc. I haven't decided are any people are inside probe or not, but as it has windshield, I guess there are. Building is something like scientific campus mixed with recreational smth - I don't know. Alien that is on a hill - I tried to make him look like it came from some late 70's early 80's shooter like Galaxian or Phoenix. Hope it answers your question.

I like this. It gives a nice retro-like feeling. Perhaps you could tell more about the concept behind this?