I enjoy this as a fun little puzzle with a neat narrative! I had a similar idea myself for a deckbuilding cardgame based on a similar idea and playing this one really elucidated a lot of different ideas and ways it could go. I love that you have wells, converter, defenses, and goals. It's an elegant and neat system! It's a little DIFFICULT even on the easiest setting, because a lot of the things you want to do for the second two scenerios require a lot of advanced knowledge, and it takes a very long time to fail the game if you have yourself on a dead end path. Very punishing game. However, it's quite rewarding when you finally win. It's a great challenge!