There was a bit of accident making the last patch which left the game in a disastrous and nearly unfinishable state. That's why you get playtesters folks. Here's the fixed version
8 new levels, 2 save doors, savesteless friendly difficulty (you have infinite lives)
Have fun!
EDIT
Since F1 suffers from a poor design (spike platform that can seemingly let you live, a few people have assumed they are the correct route) here's a small guide for it. Because Riverback is unable to open the ROM, this is the only fix without reimporting and adjusting all the levels.