Hey, I really loved the concept and gameplay! This is a real gem!! I have some feedback though... I found it far too easy. I played until like wave 31 on my first try and never really felt challenged. My computer had a hard time staying speedy with all the pixel art slowing it down at that level, but other than that, I saw everything the game had to offer with not as much trial/error or difficulty as I was hoping.
Some ideas:
-Further limit how many dice the player can have.
-Add new enemies, perhaps some that require a different solution than others, maybe like ranged units or units that switch lanes.
-Add more towers so it's harder for the player to get the ones they want.