Pros
I really enjoyed the idea
the sounds and the artstyle was okay
Kons
I missed a tutorial, putting it in your project page is definetly not a good solution
After reading the project page i didn't read the *spoiler* and I proceeded to play the game, i didn't know what the hell i was doing, i only recognised the tetris and the game of life part. After playing i then read the *spoiler* part. It contained crucial information for understanding the game it should be part of the tutorial and not part of the spoiler. Except of course if your aim was to leave the player confused and not understanding anything.
In the tetris part you should allow the player to move the pieces horizontally multiple times if they hold the left or right key.