Nice game, finally one where I am not too bad.
The power up are really a lot and nice to discover, more towers would have been good, but it's a game jam so I can't complain about it.
I had to stop to play because after 20 minutes I got only 2 damage because I was distracted replying to a message on my mobile.
The only issue is that you don't see a preview of the area that the tower will cover and you can't place them nicely in tiles. for the rest a nice game.
Great result for the jam. You can definitely improve and make it a nice game!