You made a very cool Vampires Survivor like Game, with some "Take and Hold the Area" mechaniks which where very interessting. The shooting birds are kinda strong tho.
I was wondering why you switched the styles - from clean drawn UI to pixel art GameGrafics - maybe just Line the Pixelart in Photoshop or Krita and you would have a more consitant look of the game.
Over all the Game is solid and could be expanded very well! Great Job!