Hey! Thanks for the support and I understood you loud and clear : ) No worries at all about being able to pay more. I plan on releasing these singles for versions every other month or so and perhaps after my next 1 or 2 updates I can release another one. I will say that it has much more than any version in circulation.
The newer versions more mutations available after day 14 in the game and the upcoming update reworks a lot of them and also has some unlocks (mutations, objectives, minigame, etc).
If you'd like, you can join the discord because I let people there know about updates :