So a little trick I found is if you kill a monster and before the coins get taken up you can switch to a higher monster and the value of the coins then change to the higher monster. So in theory you can get boss coins by beating the monster before the boss and switch to him while the coins are still bouncing and then collect them and they will give the amount of the boss without actually being defeated.
So i had earned 217 credits and did my first soft reset, The cost for the first purchase became cheaper than it produced, which allowed for an infinite amount of upgrading, not sure if this was intended. to give an example. It cost me #+32 to upgrade, but it currently produces #+69 so I am able to upgrade it indefinitely.
Hopefully I have it fixed enough to be playable now.