Really cool idea for the game! I really like the sea rising mechanic making you plan where to place each building, and it ties in great with the theme of the jam!
I only had two issues with the game. One being that the ui isn't very intuitive with buying the different buildings (it took me a couple of tries to figure out that the buttons would first open up different categories and then show me the buildings).
The second issue was that there seemed to be a very specific order in which I had to buy the buildings at the start, otherwise I would run out of money and would have to wait for a couple of minutes at a time. I didn't really figure out how to buy more than a couple of buildings and solar panels without running out of cash.
I think both of these problems could be solved with a more interactive tutorial, guiding the player through the very early part of the game, untill they understand all of the mechanics.
I didn't get very far into the game, but what I played seemed really cool and very ambitious, so well done!