Good game, though perhaps an endless mode could be added. The last boss, with enough lives and sufficient firepower, could be easily killed with minimal dodging.
Reading the wiki, I found that that 1 mist energy regenerates every 13.4 minutes. So, 10 energy required to enter a level times 13.4 minutes take over 2 hours. I think that this might be a little too high...
Wait... so apparently, while you are driving this rocket guzzling thousands of gallons of fuel, you are constantly gaining money from some unknown source?
Haters are on the loose.