The survivors genre is a tried and tested format and you've clearly leant into that with the theme which I think is fine.
The game itself is fun, and the only complaint I would have is that it's trivially easy. I have no problem with jam games being quite simple and they should ideally be completable by most players first time; but I stood still and just get clicking upgrades. By the time I hit level 200 I assumed there wasn't going to be any more or an ending. I think a little more tuning would have gone a really long way here, because the player doesn't really need to play the game and can just stand still.
The music and assets are nice, but I'm not too sure where they came from, if they were made by your team or they are from a pack. It would be nice if that was disclosed somewhere.
All in all it's a decent game, but I do find myself lacking basic bits of info which would have been great even in a short description. Thank you for the submission.