I assume this is Money Puzzle Exchanger Neogeo (1997). Is deffo not something I would have pay money to play back in the late 90s but is a matching game.
You only need match 2x 5s, 2x50s or 2x500s to get 10, 100 and 1000 (only 1000 coins are actually fully removed from the board) 1s,10s,100s require 5 of each to match. Like with many of these matching games chain reactions can occur but I didn't get so many that I noticed heavy bonuses for doing so.
I'm sure there's plenty of techniques and bonuses to be had that'll make this score really tiny towards the end of next week.
After a few goes went from 13k, to 15k then to 27,088.
Update:
Quite catchy this game. Had a few more tries and got up to 52,299