Love the tower defense, always dreamed of making one myself but never got to it. Im not sure what dave does... but i think he's a bit crazy.
Had plenty of fun getting as far as i can but you just get so overwhelmed so fast and i cant move them all in time, i think it would be cool if there was a pal that united the pals, making the ones within range move in unison (just throwing ideas out there)
all in all great job!