I so rarely give out a 5* but you got one. WELL DONE!
If there was a way to clean up the control slop through points or bonus items ... for your future expansion.
BTW I so LOVE the battlezone-esque line graphics ... takes me to recalling the arcades back in the day.
Crash on finish bug also happened to me on lvl 8. Respawned on farside and car faded out after a few seconds. Road vanished and points kept rising as long as holding up arrow down. Release stopped points after a few seconds, but press again and it keeps rising again... Replay level lets you out of Infinite limbo zone.
The steering routine needs some work. the wheels should return to straight after a few seconds. constantly steering left then right then left to minimize the over compensation is not realistic.
I think you are mixing the term Shareware with Demo. Shareware typically releases most of the game for a trial period (eg 15 days) and often has some limitations. Two levels is a Demo version and not a Shareware version. Aside from that, trying to sell a game on what has been a free game site is kinda scuzzy. Lastly, this primitive game is so NOT worth $15.
This is reminiscent of dos games from the mid/late-80's. Annoying 1 spot to jump subroutines. Sad actually for what you can do today.
As to charging 150 kreds ~ $15 for this!! My you think a lot of yourself.
Rating 3/5 for effort and nostalgia -2 points for trying to charge $15 for something not worth $0.15
RATED as 1/5
I have to agree that this is extremely similar to Ambrosia Software's "Escape Velocity" line of games. EV series does have better graphics ... but other than a few small differences ... Super Space 3-D is nothing but a cheap knockoff.
Sorry to say so ...