Do you want to make lots of cash earlier? Go to in-battle item and drop those 2 items to sell. Click in-battle item again and drop them to sell, and repeat it till you see 10k of reward. Then sell it and buy the auto-revive (its 5k and you will earn lots of money while doing it).
Cool bug (known as Absorb item): You select the desired item (armor / weapon) in inventory tab, and click in options tab. Now click inside the gray box. And you will gain stats of the item. But you will lose that item as a conuterpart.
Before the badges and multiplayer mode, fix the issue of time response from keyboard.
Everytime that i use the left arrow keyboard, the character responses, but if i choose to make another comand, the character continues going to the left side without responding the other comand... it causes alot of deaths.