Very interesting mechanic, lovely transitions between levels and the difficulty curve is just right and stays fresh all through the game. Reminds me of GISH.
Start from nothing. Absolute zero. Roll around. Jump. Improve. Shapeshift. Become something more. Jump higher. Move faster. Reach places that you were not able to reach before. Become a 1.
Created for Ludum Dare 45.
WASD/arrow keys - Move
Space - Jump
Left Shift - Shapeshift
Enter - Start level
Escape - Exit to menu
Extract downloaded files and play.