Dunno if it fits the theme/prerequisite that much, but it's definitely a really great deck building game idea! The beginning was too hard for me (I only found the fish that the tutorial told me about, probably highly unlucky?):
But I survived that week then it actually became a bit too easy to make it through the later weeks. But yeah I really like the concept and a lot of the ideas you visited here. Maybe at the start, the map can be smaller or some of the early pieces can have abilities (which are where the most fun is). Great job!