This was a cool idea, and once I understood what was going on I had fun with it. It was fun trying to manage the eggs and think ahead on whether to nest these eggs, or save them to feed my monsters. I also thought that the mixing of paints for colors was a cool idea. I felt really smart when I painted my green egg to yellow and nested it so I could deal with the yellow eggs effectively.
The lack of playtesting probably made the game harder than it should be. I haven't been able to get past level 2, and because losing restarts the whole level, I didn't feel like continuing.
Sometimes, my penguin wouldn't place down the egg or pedestal, and I kept having to spam the spacebar.
I know the the monsters won't attack if they are hungry, but it looks like even if I feed them during the wave they still won't attack. That's how I lost the second time, I started the wave to grab some eggs so I could feed my monsters, but they didn't attack after they were fed.
Also, and I know that this was on a time limit, but this game really needs a tutorial. A 4 page how to play screen is never a good thing. Too much information to remember, and on my first time playing, even after reading, I was still confused. I had to read it again, after I learned how to move around, in order to get it. It really needs a tutorial stage that teaches everything one at a time.