Pretty decent game, the idea of using water as currency as well as health is really neat. The building placement mechanics worked well, and the movements felt fluid. Sound and music were alright but nothing particularly special... However, I would also like to point out in a user experience perspective on the enemies' attack. like ranged enemies shouldn't be able to immediately take water from afar, and needs some sort of telegrph or communication... But other than that, it's a cute simple little game, once you got the strategy of finding the lakes and then building collectors, it's pretty much automatic from that point. There also doesn't seem to be an endgame which is fine, but ideally giving the players some sort of satisfaction in a game jam would totally go a long way.
Other than that tho, very well done!