It is really fun, as well as a bit of stressing in the good way. Although it doesn't follow the limitation (at least of what I've seen), it's very solid to have been made in a single day! Good job! :D
Hey thanks for playing.
For me it follows the limitation in the concept of a cell that depends on molecules (proteins, lipids, etc.) to help in the metabolic process. So you depend on your health (what you eat and reaches the cell) and your help to metabolise to save the cell.