Oooh I'm enjoying this a lot! The physics feel "correct". When I crash in an impressive way several times in a row I think I'm watching a video compilation :) I like the way I can quickly restart when I mess up, and there's a lot of different & helpful feedback, so I can experiment and learn quickly. I'd have a word with the site manager though... who put that building there haha :)
I also really like the levels screen. It's really simple and neat.
I can't quite manage level 8 yet but I'll keep trying.
A few polishing suggestions (which I expect are on your list already, but just in case...). At first, I read the top right of the screen as "HS Assist", and thought the directional arrow was a shadow on the ground; In the level screen, when I'm on level 4, I'd like pressing right to take me to level 5; I think I'd like a sound effect when I run out of fuel (but I'm not sure - the current sudden absence of sound followed by impact amuses me - I guess I expect it'd be just like that IRL, followed by a wry "back to the drawing board" comment).
Thanks!