You could do that, since using a lot of different colours isn't a tool or a hack but it might get boring after a while. We can however use digital puppetry, which involves using the enemies and bosses in a right way and hoping AI performes well. I forgot that JJ2 is really easy to manipulate with JCS and the like.

Btw there are coins, both silver and gold in the game. Remember the places where you needed a number of coins for a bonus? And they are also in JCS.