Well done for a first game jam! The puzzle design is actually good, the answer was never the most intuitive one, but finding the correct solution wasn't that difficult either.
Graphics could use a bit more work:
The flag and the player character don't stand out from the background. Using more contrasting colors would probably help.
The enemies stand out better from the backgrounds, but look too similar to each other. It'd be better to make them distinct from one another. Color would probably help there, too. In particular, the rotating enemies could look different from each other so you don't have to wonder which direction each one turns to.