Wow super impressive work for just one week of solo dev, honestly with a tiny bit more polish on the UI I would believe you if you told me this was a steam game, not a game jam game submitted a day before the deadline.
The core gameplay loop is simple but satisfying, I can't complain about an upgrade/defend cycle. It took a couple attempts to click but each time I failed I felt like I knew how to avoid the previous pitfalls and immediately wanted to go for another attempt. All of that is reinforced by some really strong visuals and theming. Not to mention the sheer quantity of content for a game jam game.
Shout out to the little bit of the game's writing as well. It's fun and establishes tone really well. All in all a really solid game with an impressive scale for one week of work!