I have added a new enemy. These thing will fly across the map just to explode in your face. And the game name will be Byproduct :p
And I also have bad news, turn out the upgrade and evolve system I have in mind is too advance for me right now.
So, I decided to simplify the game even more.
You can't evolve anymore and there are only 3 upgrade drop by enemies when they are killed and they only last temporary. But I will make sure these upgrades are special and fun.