I stopped playing after I had no fuel left (after I reached the Cash objective of the 4 unlockable levels). Level 5 is the only unlockable level where I managed to reach the Time objective over this timespan, which is fine of course.
While the game stops looking like a NES game when you increase the size of the window the game could play exactly the way it does on a console and I would still say it would look sort of kind of like it looks anyway. The Curse mode is a cool twist, the game gets really fun as you get there.
Thanks for sharing!