Hey, thank you for making a game out of the cart! I love how you ran with the aesthetics, right down to the design of this page.
The game's a real challenge, I think my best streak was 2! It makes the title pretty amusing, this method of spacefaring seems rarely practical. The refueling/overheating mechanic is very satisfying. Planning ahead is only roughly possible for me, in particular because of the influence of the moving planets. But as hard as the game is, I imagine a very skilled player could win most of the time. If you did want to make it more accessible without significant changes, maybe a larger fuel tank with a lower limit as the player gets a longer streak could ease people into the game.
Anyway, I had a lot of fun with it, well done!