Fun game! Where's your traffic coming from? Is it growing rapidly right this instant? If I were you I'd (a) double check the servers aren't going to crash, (b) start pitching as many bloggers and Twitter personalities about it as possible, (c) try to "capture" traffic with prominent links to a Twitter account, forum, mailing list, etc.
For a game like this, if you want it to stay popular for a while, you'll probably want to add more maps, mechanics, and/or rewards for players who keep playing and do well. Skins are a fun and simple idea, as is some sort of persistent score.
You might want to ask the founders at my site for advice, too: https://www.indiehackers.com/forum. I don't think any of them have made money off games specifically, but they might have good insights regardless.
For a game like this, if you want it to stay popular for a while, you'll probably want to add more maps, mechanics, and/or rewards for players who keep playing and do well. Skins are a fun and simple idea, as is some sort of persistent score.
You might want to ask the founders at my site for advice, too: https://www.indiehackers.com/forum. I don't think any of them have made money off games specifically, but they might have good insights regardless.