I am so glad that you figured out the way to play it. You totally nailed the design principle I had in my head for this and that's exactly what I was hoping the player would experience. The push and pull balancing act is the point.
The water explosion mechanic and the refill indicator are amazing ideas!
The cooling was such a lateral thinking move, i don't think most people intuitively figured out what it's purpose was. It's genius though. Attack/defense in real time is very hard to achieve outside an rts, and as much as i love rts games they get too complicated quick. The other way to go is multiple players with sports ball or capture the flag, but you nailed the feeling in a solo game with simple mechanics no less.
So yeah, huge fan of you guys now and I'm pretty eager to see either updates or whatever new projects you have in mind. I'd donate if you had a patreon!
Oh and if you have tabletop simulator i'd total take you on in Tzar. I've beaten all my friends so far ^^.