I played it through on my first try and got ~52k gold during the run. The combat is ridiculously easy if you attack offensive parts when you have more speed and supportive parts when you're low on speed. Killing enemies in order gets you enough money to buy the best parts from the shop keepers (if you make sure you've got more than enough money when entering a shop). I would like to see some improvement on combat and maybe make the transitions between screens a bit quicker.