Glad you liked the game so far!
The game will always be free (it wouldn't sit right with me to put a price tag on it, after receiving support for years on Patreon). If you ever find yourself with more money to throw around, and you still want to support me, I wouldn't say no, of course. XD
Just make sure you have plenty to spare, mine isn't the kind of project which should be a high priority for anyone, and like most Patreon projects, it's terrible value for your money.