Its a really nice tower defense with a different concept
Art: the pixelart colour pallete looks soft and really pretty, it really makes the game more appealing
Sounds: nothing to say here other that they really fit with the style
Mechanics: It's pretty good, creative and interesting for a short game, I think that using this concept in a longer game would be interesting to see!
This game is well executed for a game jam, and I would love to see more of your creations!
Keep it souled!