Pretty cool idea to invert the way a tower defense game usually works. But the big issue with this concept is, that it’s to easy. You can just build a wall of turrets which then block the path of the incoming enemies. I think the price for a turret is way to low and for a upgrade is to high. I didn’t even realize you could update the turrets, because it was way more efficient just building a wall of towers, and with that having no problem beating the game.

Also when you do that and you have a lot of turrets the game starts lagging quite a bit. I still think it’s a cool concept, but it needs work with the balancing.

Fun defence game to be said
I Also did a defence game but kinda different!

Fun tower defense. Some audio would really make this pop though.

Fun game, nice twist on the tower defense genre. Special mention to the purple tower with the push. 

Neat little Tower Defence game! I like it

Hi, nice game. The art was the best part. A few suggestions... I would add sound, give the player a bit more money to start with, and make the enemy's spawn in smaller bunches.