Hey man, its awesome that you tried your best.
i would change it from collecting gasoline to maybe... cookies? so it at least fits the theme in a way. also the coins don't... quite... have a use.....
none that i know of so cutting them out totally would be an awesome idea.
it would be a good idea if you made the play button stand out a bit. a subtle animation or square graphic that is slightly transparent, something that makes your players know its clickable and not just text.
its nice you also added SFX
in all, collecting cookies and keeping the player alive is a lot better than collecting gasoline... just my opinion.