That sounds like a cool idea, but a lot of players will most likely choose to do the solo mode a lot compared to working with others, because it’s a lot faster and the levels start small and then gradually becomes bigger. There is a small plasma population and adding a solo mode could divide it up a little and will make it harder for players to find big groups of players doing plasma together. A way to encounter this would be to lessen the amount of plasma coins, or even just give pieces of the coin 5 per rounds to make it fair.