Hey!
here is a video of me playing your game!
https://www.youtube.com/watch?v=GXUB446qxu4
I didn't watch your video on here first, so I start out looking like a total NOOB :P lol
But it was fun! And I picked up the core mechanic quite quickly, I had no problem figuring out the way it works even tho I didn't have any instructions, so thats a good sign!
Here are some suggestions
* Increase the amount of paint given in a way that isn't just upping the kill value from 1 to 2. I think maybe if some birds or something periodically flew across the screen, and you could click them (if your fast enough and watching) they would explode and you get say 10 paint. Would be an interesting way of giving more towers to play with and keep players on there toes!
* Maybe make it so the map is semi random or procedural generate it. Would mix up the play experience, but this is just a personal preference, some might like it stay consistent to develop a strategy. Maybe Even change the map after after X many waves.
* A few varied SFX for when you kill a blob, even just 3 different squishy sounds would add a nice feel to killing them.
* Have a couple of enemies that behave differently to the blobs, I thought maybe there could be a sneaky rat (or whatever) that slowly moves towards your hearts in the top right corner and if you don't click it fast enough, it starts taking your hearts back off the screen. There could also be some invisible enemies that you need a tower upgrade to see, and maybe one that starts building new paths for the blobs to follow, making you need to scramble to sell and replace your towers to survive.
* Since it is paint defense, add some more colors slowly through out the game! It would be fun to see the screen covered in multicolored paint as the levels go on!
Hope this feedback helped! If you need me to clarify or play it again in the next patch, just ask!
Thanks so much for your feedback on Roopit and Boopit! It helps a lot! :D