I hate how the game just ends after you run out of fuel and you lose all your upgrades!... I was at 24 combo, I was about to get the badge of the day, [to get that badge of the day you have to get a 25 combo] AND I RAN OUT OF FUEL!!! :(
Once you get to hard mode or near hard mode, don't buy anything. {on levels blobs give you stuff that you buy at the blacksmith for $900, more or less}
I like holding up weapons/clothing/potions/rings/etc and put it on the other people/mock people with hp potions/put ugly clothing on people/"trap" people in rings/stabbing people with weapons.