First 15 minutes: silly horse game.
Next 15 minutes: i am more machine than horse.
Next 15 minutes: i am more gasoline than machine.
Last 15 minutes: i am 90%+ gasoline. This game is an asteroid strip mining ship builder disguised as a silly horse game.
Excellent. One of the more addicting games this jam. Adding some achievements or goals, or additional maps, or some sort of loan you have to pay off to increase difficulty, would all greatly enhance the experience IMO, but as it stands, it is a great core idea.