HOLY CRAP
I can't believe you made this in a game jam. the quality here is INSANE and it's probably the best looking game in the jam. Having the tentacles clip into the screen from behind you is a BONE CHILLING experience. There's sooooooo much going on here mechanically, and all the particle effects you've included look fantastic and play well together strategically.
Also did you make any of the models or textures? They're phenomenal.
I seriously don't know how you made this in such a short amount of time, man, this could be the start of an fully awesome commercial game.