I think we can all safely say the graphics are good. But I mean, to be asking up to Euro.25000 as a "donation" is crap and is probably more out of hope and desperation than any sort of genuine purpose.
People would buy it with only 1 car and track I bet, if the game was good enough...and, like most games like iRacing, LFS, etc, further cars, updates and bugfixes can be released as and when.
Seems like they are wanting to do/asking for too much, too early.