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.
Been there (long time ago): no sleep, server crashing, etc..
First: get some sleep. Not sleep; but time-off periods. You'll need to think / do / whatever other stuff in your life that will be slowing and draining your energy (well, what's left of it).
Second: Get help. Someone you trust you can tell how to restart / reboot / do quick fix for the app while you are /away.
Third: Don't trust the stats. At least not what you think your eyes see: If there is rising trend, probably is just a spike. Stuff does not usually grow "linearly" or "exponentially". It grows by growth quants. That is, you get into the 1-2k users, then jump into 4-6k, then 10-15k and so on.
Fourth: Going up need energy (time, effort, money, sweat, energy). Going down wastes energy and is much easier and faster. This is like climbing. So be sure to have something built-in that makes going down harder, like rewards for daily/weekly players.
I see where you guys are coming from, and I admit that there's an advertising nature in this post. However, I stand corrected that this post isn't "just an ad". I am also looking for advice here.
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.