Doodlera: Drawn Existence

Press and hold the Backspace key for a short while to swap between the new music tracks in game and also press and hold F10 for a short while to switch between the 2 old music tracks and press the M key to mute the music, (and press both M + Backspace or M + Backspace + F10 to turn back on the music) press the enter key to take a screenshot, press the right shift to make the hand right handed and press the left shift to make the hand left handed, and to summon stuff just press random keys.

Story: You where just given a Pen of Life and a piece of blank paper and you are task to make a ecosystem, you start doodling creatures, obviously since this is your first time the creatures aren't that good but it works, you doodle a wide variety of organisms and it worked out and now all you have to do is place them in the world and hope the ecosystem works out, so will you make a thriving ecosystem or go ham and cause lots of suffering? The choice is yours...